52491564 has 30 divisors (see below), whose sum is σ = 137224164. Its totient is φ = 17497080.

The previous prime is 52491559. The next prime is 52491583. The reversal of 52491564 is 46519425.

52491564 is a `hidden beast` number, since 5 + 2 + 4 + 91 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 80682 + ... + 81329.

Almost surely, 2^52491564 is an apocalyptic number.

52491564 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52491564 is an abundant number, since it is smaller than the sum of its proper divisors (84732600).

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

52491564 is a wasteful number, since it uses less digits than its factorization.

52491564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162027 (or 162016 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 52491564 is about 7245.1062104016. The cubic root of 52491564 is about 374.4235623731.

The spelling of 52491564 in words is "fifty-two million, four hundred ninety-one thousand, five hundred sixty-four".