Was the Founder of Islam a Believer?

Muslims are called "believers" in the Quran. Even Allah is called a "believer" (See my post: The 99 'Names' ) But is the founder of Islam?

S 2:285 The messenger has believed in what has been sent down to him from his lord, and the believers. All have believed in Allah and his angels and his books and his messengers. We do not distinguish between any of his messengers. And they have said: We have heard and obeyed. Your forgiveness, our lord, and to you is the destiny.

S 33:50 Prophet, we have made lawful for you your husbands whom you have given their wages to and what your right hand possesses from what Allah has given you as booty and the daughters of your paternal uncles and the daughters of your paternal aunts and the daughters of your maternal uncles and the daughters of your maternal aunts who emigrated with you and a believing woman who has given herself to the prophet if the prophet wants to futter her--exclusively for you, excluding the believers. We knew what we made obligatory upon them concerning their husbands and what their right hands have possessed, that there should be no difficulty upon you. And Allah was a forgiver, merciful.

If he was a believer, and if Aisha was a mother of the believers, did he strike his mother?

Regarding 'mother', see: Qur'an Inconsistency: Can I call her mother?

Mothers and Daughters

S 33:59 Prophet, tell your husbands and your daughters and the women of the believers to draw their jalabib over them. That is more appropriate that they should be known and not harmed. And Allah was a forgiver, merciful. 60 If the hypocrites and those in whose hearts is disease and the agitators in Al-Madinah do not cease, we will cause you to lure them then they shall not be your neighbours therein except a little.

It doesn't say: 'the women of the other believers'.

Wife or Husband?

Further reading:

La Hawla wa-la Quwwata illa Billah