55837215 has 96 divisors (see below), whose sum is σ = 120821760. Its totient is φ = 24349248.

The previous prime is 55837183. The next prime is 55837217. The reversal of 55837215 is 51273855.

55837215 is a `hidden beast` number, since 5 + 583 + 72 + 1 + 5 = 666.

It is not a de Polignac number, because 55837215 - 2⁵ = 55837183 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55837215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55837217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 151962 + ... + 152328.

It is an arithmetic number, because the mean of its divisors is an integer number (1258560).

Almost surely, 2^55837215 is an apocalyptic number.

55837215 is an abundant number, since it is smaller than the sum of its proper divisors (64984545).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55837215 is a wasteful number, since it uses less digits than its factorization.

55837215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 405 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 55837215 is about 7472.4303275440. The cubic root of 55837215 is about 382.2151666485.

It can be divided in two parts, 558 and 37215, that added together give a palindrome (37773).

The spelling of 55837215 in words is "fifty-five million, eight hundred thirty-seven thousand, two hundred fifteen".