56531061 has 32 divisors (see below), whose sum is σ = 88704000. Its totient is φ = 35483184.

The previous prime is 56531029. The next prime is 56531071. The reversal of 56531061 is 16013565.

It is a happy number.

56531061 is a `hidden beast` number, since 5 + 653 + 1 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 56531061 - 2⁵ = 56531029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134710 + ... + 135128.

It is an arithmetic number, because the mean of its divisors is an integer number (2772000).

Almost surely, 2^56531061 is an apocalyptic number.

It is an amenable number.

56531061 is a deficient number, since it is larger than the sum of its proper divisors (32172939).

56531061 is a wasteful number, since it uses less digits than its factorization.

56531061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 56531061 is about 7518.7140522831. The cubic root of 56531061 is about 383.7918183092.

It can be divided in two parts, 565 and 31061, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 56531061 in words is "fifty-six million, five hundred thirty-one thousand, sixty-one".