56031697 has 4 divisors (see below), whose sum is σ = 56076196. Its totient is φ = 55987200.

The previous prime is 56031667. The next prime is 56031737. The reversal of 56031697 is 79613065.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50466816 + 5564881 = 7104^2 + 2359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56031697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56031617) 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, 20304 + ... + 22897.

It is an arithmetic number, because the mean of its divisors is an integer number (14019049).

Almost surely, 2^56031697 is an apocalyptic number.

It is an amenable number.

56031697 is a deficient number, since it is larger than the sum of its proper divisors (44499).

56031697 is a wasteful number, since it uses less digits than its factorization.

56031697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44498.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 56031697 is about 7485.4323188444. The cubic root of 56031697 is about 382.6584064870.

The spelling of 56031697 in words is "fifty-six million, thirty-one thousand, six hundred ninety-seven".