91624225 has 36 divisors (see below), whose sum is σ = 142754752. Its totient is φ = 57103200.

The previous prime is 91624223. The next prime is 91624259. The reversal of 91624225 is 52242619.

It is not a de Polignac number, because 91624225 - 2¹ = 91624223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91624223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19012 + ... + 23338.

Almost surely, 2^91624225 is an apocalyptic number.

It is an amenable number.

91624225 is a deficient number, since it is larger than the sum of its proper divisors (51130527).

91624225 is a wasteful number, since it uses less digits than its factorization.

91624225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366 (or 4350 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 91624225 is about 9572.0543771962. The cubic root of 91624225 is about 450.8202734200.

The spelling of 91624225 in words is "ninety-one million, six hundred twenty-four thousand, two hundred twenty-five".