56645031 has 4 divisors (see below), whose sum is σ = 75526712. Its totient is φ = 37763352.

The previous prime is 56645009. The next prime is 56645053. The reversal of 56645031 is 13054665.

56645031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (56645009) and next prime (56645053).

It is not a de Polignac number, because 56645031 - 2¹⁴ = 56628647 is a prime.

It is a super-2 number, since 2×56645031² = 6417319073981922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56645031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56645131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9440836 + ... + 9440841.

It is an arithmetic number, because the mean of its divisors is an integer number (18881678).

Almost surely, 2^56645031 is an apocalyptic number.

56645031 is a deficient number, since it is larger than the sum of its proper divisors (18881681).

56645031 is a wasteful number, since it uses less digits than its factorization.

56645031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18881680.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 56645031 is about 7526.2893247602. The cubic root of 56645031 is about 384.0495609317.

Adding to 56645031 its reverse (13054665), we get a palindrome (69699696).

The spelling of 56645031 in words is "fifty-six million, six hundred forty-five thousand, thirty-one".