91500056 has 8 divisors (see below), whose sum is σ = 171562620. Its totient is φ = 45750024.

The previous prime is 91500053. The next prime is 91500089. The reversal of 91500056 is 65000519.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 91499998 and 91500034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91500053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5718746 + ... + 5718761.

Almost surely, 2^91500056 is an apocalyptic number.

It is an amenable number.

91500056 is a deficient number, since it is larger than the sum of its proper divisors (80062564).

91500056 is a wasteful number, since it uses less digits than its factorization.

91500056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11437513 (or 11437509 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 91500056 is about 9565.5661620209. The cubic root of 91500056 is about 450.6165310558.

The spelling of 91500056 in words is "ninety-one million, five hundred thousand, fifty-six".