55637931 has 8 divisors (see below), whose sum is σ = 74639680. Its totient is φ = 36864072.

The previous prime is 55637873. The next prime is 55637951. The reversal of 55637931 is 13973655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55637931 - 2⁹ = 55637419 is a prime.

It is a super-2 number, since 2×55637931² = 6191158731921522, 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 55637931.

It is not an unprimeable number, because it can be changed into a prime (55637951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56401 + ... + 57378.

It is an arithmetic number, because the mean of its divisors is an integer number (9329960).

Almost surely, 2^55637931 is an apocalyptic number.

55637931 is a deficient number, since it is larger than the sum of its proper divisors (19001749).

55637931 is a wasteful number, since it uses less digits than its factorization.

55637931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113945.

The product of its digits is 85050, while the sum is 39.

The square root of 55637931 is about 7459.0837909223. The cubic root of 55637931 is about 381.7599137377.

The spelling of 55637931 in words is "fifty-five million, six hundred thirty-seven thousand, nine hundred thirty-one".