55919238 has 16 divisors (see below), whose sum is σ = 112408560. Its totient is φ = 18544736.

The previous prime is 55919219. The next prime is 55919287. The reversal of 55919238 is 83291955.

It is a super-2 number, since 2×55919238² = 6253922357001288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55919238.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22473 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (7025535).

Almost surely, 2^55919238 is an apocalyptic number.

55919238 is an abundant number, since it is smaller than the sum of its proper divisors (56489322).

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

55919238 is a wasteful number, since it uses less digits than its factorization.

55919238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47511.

The product of its digits is 97200, while the sum is 42.

The square root of 55919238 is about 7477.9166884902. The cubic root of 55919238 is about 382.4022288448.

The spelling of 55919238 in words is "fifty-five million, nine hundred nineteen thousand, two hundred thirty-eight".