55381056 has 56 divisors (see below), whose sum is σ = 152912064. Its totient is φ = 17656320.

The previous prime is 55381021. The next prime is 55381069. The reversal of 55381056 is 65018355.

It is a super-2 number, since 2×55381056² = 6134122727350272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855 + ... + 10686.

Almost surely, 2^55381056 is an apocalyptic number.

It is an amenable number.

55381056 is an abundant number, since it is smaller than the sum of its proper divisors (97531008).

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

55381056 is a wasteful number, since it uses less digits than its factorization.

55381056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12579 (or 12569 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 55381056 is about 7441.8449325419. The cubic root of 55381056 is about 381.1714909200.

The spelling of 55381056 in words is "fifty-five million, three hundred eighty-one thousand, fifty-six".