91225312 has 24 divisors (see below), whose sum is σ = 185395392. Its totient is φ = 44140800.

The previous prime is 91225297. The next prime is 91225331. The reversal of 91225312 is 21352219.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44989 + ... + 46972.

It is an arithmetic number, because the mean of its divisors is an integer number (7724808).

Almost surely, 2^91225312 is an apocalyptic number.

It is an amenable number.

91225312 is an abundant number, since it is smaller than the sum of its proper divisors (94170080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91225312 is a wasteful number, since it uses less digits than its factorization.

91225312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92002 (or 91994 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 91225312 is about 9551.1942708752. The cubic root of 91225312 is about 450.1650620808.

The spelling of 91225312 in words is "ninety-one million, two hundred twenty-five thousand, three hundred twelve".