91615825 has 12 divisors (see below), whose sum is σ = 129832960. Its totient is φ = 62822160.

The previous prime is 91615817. The next prime is 91615829. The reversal of 91615825 is 52851619.

It is not a de Polignac number, because 91615825 - 2³ = 91615817 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91615829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261585 + ... + 261934.

Almost surely, 2^91615825 is an apocalyptic number.

It is an amenable number.

91615825 is a deficient number, since it is larger than the sum of its proper divisors (38217135).

91615825 is a wasteful number, since it uses less digits than its factorization.

91615825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523536 (or 523531 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 91615825 is about 9571.6155898573. The cubic root of 91615825 is about 450.8064961101.

The spelling of 91615825 in words is "ninety-one million, six hundred fifteen thousand, eight hundred twenty-five".