56531351 has 2 divisors, whose sum is σ = 56531352. Its totient is φ = 56531350.

The previous prime is 56531339. The next prime is 56531359. The reversal of 56531351 is 15313565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56531351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56531359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28265675 + 28265676.

It is an arithmetic number, because the mean of its divisors is an integer number (28265676).

Almost surely, 2^56531351 is an apocalyptic number.

56531351 is a deficient number, since it is larger than the sum of its proper divisors (1).

56531351 is an equidigital number, since it uses as much as digits as its factorization.

56531351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6750, while the sum is 29.

The square root of 56531351 is about 7518.7333374711. The cubic root of 56531351 is about 383.7924745822.

It can be divided in two parts, 5 and 6531351, that added together give a palindrome (6531356).

The spelling of 56531351 in words is "fifty-six million, five hundred thirty-one thousand, three hundred fifty-one".