56540531 has 2 divisors, whose sum is σ = 56540532. Its totient is φ = 56540530.

The previous prime is 56540501. The next prime is 56540579. The reversal of 56540531 is 13504565.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56540531 is a prime.

It is a super-2 number, since 2×56540531² = 6393663291523922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56540494 and 56540503.

It is not a weakly prime, because it can be changed into another prime (56540501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270265 + 28270266.

It is an arithmetic number, because the mean of its divisors is an integer number (28270266).

Almost surely, 2^56540531 is an apocalyptic number.

56540531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540531 is an equidigital number, since it uses as much as digits as its factorization.

56540531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 56540531 is about 7519.3437878581. The cubic root of 56540531 is about 383.8132478591.

The spelling of 56540531 in words is "fifty-six million, five hundred forty thousand, five hundred thirty-one".