56751631 has 4 divisors (see below), whose sum is σ = 56876272. Its totient is φ = 56626992.

The previous prime is 56751619. The next prime is 56751641. The reversal of 56751631 is 13615765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13615765 = 5 ⋅2723153.

It is a cyclic number.

It is not a de Polignac number, because 56751631 - 2¹⁹ = 56227343 is a prime.

It is a super-2 number, since 2×56751631² = 6441495242320322, 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 (56751641) 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, 61635 + ... + 62548.

It is an arithmetic number, because the mean of its divisors is an integer number (14219068).

Almost surely, 2^56751631 is an apocalyptic number.

56751631 is a deficient number, since it is larger than the sum of its proper divisors (124641).

56751631 is a wasteful number, since it uses less digits than its factorization.

56751631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124640.

The product of its digits is 18900, while the sum is 34.

The square root of 56751631 is about 7533.3678391540. The cubic root of 56751631 is about 384.2903236129.

The spelling of 56751631 in words is "fifty-six million, seven hundred fifty-one thousand, six hundred thirty-one".