56917031 has 2 divisors, whose sum is σ = 56917032. Its totient is φ = 56917030.

The previous prime is 56916997. The next prime is 56917057. The reversal of 56917031 is 13071965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56917031 - 2¹⁴ = 56900647 is a prime.

It is a super-2 number, since 2×56917031² = 6479096835709922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56917631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28458515 + 28458516.

It is an arithmetic number, because the mean of its divisors is an integer number (28458516).

Almost surely, 2^56917031 is an apocalyptic number.

56917031 is a deficient number, since it is larger than the sum of its proper divisors (1).

56917031 is an equidigital number, since it uses as much as digits as its factorization.

56917031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 56917031 is about 7544.3376780205. The cubic root of 56917031 is about 384.6632936290.

Adding to 56917031 its reverse (13071965), we get a palindrome (69988996).

The spelling of 56917031 in words is "fifty-six million, nine hundred seventeen thousand, thirty-one".