53561564 has 12 divisors (see below), whose sum is σ = 107123184. Its totient is φ = 22954944.

The previous prime is 53561507. The next prime is 53561567. The reversal of 53561564 is 46516535.

53561564 is an admirable number.

It is a super-2 number, since 2×53561564² = 5737682276252192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53561567) 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, 956429 + ... + 956484.

It is an arithmetic number, because the mean of its divisors is an integer number (8926932).

Almost surely, 2^53561564 is an apocalyptic number.

It is an amenable number.

53561564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

53561564 is a wasteful number, since it uses less digits than its factorization.

53561564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912924 (or 1912922 counting only the distinct ones).

The product of its digits is 54000, while the sum is 35.

The square root of 53561564 is about 7318.5766375710. The cubic root of 53561564 is about 376.9505806648.

The spelling of 53561564 in words is "fifty-three million, five hundred sixty-one thousand, five hundred sixty-four".