55972631 has 12 divisors (see below), whose sum is σ = 66121560. Its totient is φ = 46968480.

The previous prime is 55972597. The next prime is 55972643. The reversal of 55972631 is 13627955.

It is a happy number.

55972631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55972631 is a prime.

It is a super-2 number, since 2×55972631² = 6265870842124322, 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 (55972681) 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 11 ways as a sum of consecutive naturals, for example, 13196 + ... + 16913.

It is an arithmetic number, because the mean of its divisors is an integer number (5510130).

Almost surely, 2^55972631 is an apocalyptic number.

55972631 is a deficient number, since it is larger than the sum of its proper divisors (10148929).

55972631 is a wasteful number, since it uses less digits than its factorization.

55972631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30146 (or 30133 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 55972631 is about 7481.4858818286. The cubic root of 55972631 is about 382.5238990008.

It can be divided in two parts, 5597 and 2631, that added together give a palindrome (8228).

The spelling of 55972631 in words is "fifty-five million, nine hundred seventy-two thousand, six hundred thirty-one".