55784631 has 32 divisors (see below), whose sum is σ = 87746560. Its totient is φ = 30862944.

The previous prime is 55784587. The next prime is 55784653. The reversal of 55784631 is 13648755.

It is not a de Polignac number, because 55784631 - 2⁷ = 55784503 is a prime.

It is a super-2 number, since 2×55784631² = 6223850111612322, 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 55784631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55784671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147000 + ... + 147378.

It is an arithmetic number, because the mean of its divisors is an integer number (2742080).

Almost surely, 2^55784631 is an apocalyptic number.

55784631 is a deficient number, since it is larger than the sum of its proper divisors (31961929).

55784631 is a wasteful number, since it uses less digits than its factorization.

55784631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its digits is 100800, while the sum is 39.

The square root of 55784631 is about 7468.9109647927. The cubic root of 55784631 is about 382.0951468447.

The spelling of 55784631 in words is "fifty-five million, seven hundred eighty-four thousand, six hundred thirty-one".