91631056 has 20 divisors (see below), whose sum is σ = 193675104. Its totient is φ = 41650400.

The previous prime is 91631051. The next prime is 91631077. The reversal of 91631056 is 65013619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91631051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260140 + ... + 260491.

Almost surely, 2^91631056 is an apocalyptic number.

It is an amenable number.

91631056 is an abundant number, since it is smaller than the sum of its proper divisors (102044048).

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

91631056 is a wasteful number, since it uses less digits than its factorization.

91631056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520650 (or 520644 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 91631056 is about 9572.4111904995. The cubic root of 91631056 is about 450.8314767044.

The spelling of 91631056 in words is "ninety-one million, six hundred thirty-one thousand, fifty-six".