56171125531 has 2 divisors, whose sum is σ = 56171125532. Its totient is φ = 56171125530.

The previous prime is 56171125511. The next prime is 56171125547. The reversal of 56171125531 is 13552117165.

56171125531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56171125531 is a prime.

It is a super-2 number, since 2×56171125531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56171125511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28085562765 + 28085562766.

It is an arithmetic number, because the mean of its divisors is an integer number (28085562766).

Almost surely, 2^56171125531 is an apocalyptic number.

56171125531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56171125531 is an equidigital number, since it uses as much as digits as its factorization.

56171125531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 37.

The spelling of 56171125531 in words is "fifty-six billion, one hundred seventy-one million, one hundred twenty-five thousand, five hundred thirty-one".