56565531 has 12 divisors (see below), whose sum is σ = 89133720. Its totient is φ = 34282080.

The previous prime is 56565529. The next prime is 56565539. The reversal of 56565531 is 13556565.

56565531 is a `hidden beast` number, since 5 + 65 + 65 + 531 = 666.

It is not a de Polignac number, because 56565531 - 2¹ = 56565529 is a prime.

It is a super-2 number, since 2×56565531² = 6399318594623922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (56565539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285586 + ... + 285783.

It is an arithmetic number, because the mean of its divisors is an integer number (7427810).

Almost surely, 2^56565531 is an apocalyptic number.

56565531 is a deficient number, since it is larger than the sum of its proper divisors (32568189).

56565531 is a wasteful number, since it uses less digits than its factorization.

56565531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571386 (or 571383 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 56565531 is about 7521.0059832445. The cubic root of 56565531 is about 383.8698085667.

The spelling of 56565531 in words is "fifty-six million, five hundred sixty-five thousand, five hundred thirty-one".