56855531 has 4 divisors (see below), whose sum is σ = 60199992. Its totient is φ = 53511072.

The previous prime is 56855507. The next prime is 56855567. The reversal of 56855531 is 13555865.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56855531 is a prime.

It is a super-2 number, since 2×56855531² = 6465102810583922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56855501) 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, 1672205 + ... + 1672238.

It is an arithmetic number, because the mean of its divisors is an integer number (15049998).

Almost surely, 2^56855531 is an apocalyptic number.

56855531 is a deficient number, since it is larger than the sum of its proper divisors (3344461).

56855531 is a wasteful number, since it uses less digits than its factorization.

56855531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344460.

The product of its digits is 90000, while the sum is 38.

The square root of 56855531 is about 7540.2606718866. The cubic root of 56855531 is about 384.5246982161.

The spelling of 56855531 in words is "fifty-six million, eight hundred fifty-five thousand, five hundred thirty-one".