56971031 has 4 divisors (see below), whose sum is σ = 61353432. Its totient is φ = 52588632.

The previous prime is 56971027. The next prime is 56971037. The reversal of 56971031 is 13017965.

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

It is a cyclic number.

It is not a de Polignac number, because 56971031 - 2² = 56971027 is a prime.

It is a super-2 number, since 2×56971031² = 6491396746405922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56971037) 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, 2191181 + ... + 2191206.

It is an arithmetic number, because the mean of its divisors is an integer number (15338358).

Almost surely, 2^56971031 is an apocalyptic number.

56971031 is a deficient number, since it is larger than the sum of its proper divisors (4382401).

56971031 is a wasteful number, since it uses less digits than its factorization.

56971031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382400.

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

The square root of 56971031 is about 7547.9156725549. The cubic root of 56971031 is about 384.7849048694.

Adding to 56971031 its reverse (13017965), we get a palindrome (69988996).

The spelling of 56971031 in words is "fifty-six million, nine hundred seventy-one thousand, thirty-one".