55177855 has 16 divisors (see below), whose sum is σ = 67861728. Its totient is φ = 43056000.

The previous prime is 55177769. The next prime is 55177877. The reversal of 55177855 is 55877155.

It is a happy number.

It is not a de Polignac number, because 55177855 - 2²³ = 46789247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39265 + ... + 40645.

It is an arithmetic number, because the mean of its divisors is an integer number (4241358).

Almost surely, 2^55177855 is an apocalyptic number.

55177855 is a deficient number, since it is larger than the sum of its proper divisors (12683873).

55177855 is a wasteful number, since it uses less digits than its factorization.

55177855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its digits is 245000, while the sum is 43.

The square root of 55177855 is about 7428.1797905005. The cubic root of 55177855 is about 380.7047287107.

The spelling of 55177855 in words is "fifty-five million, one hundred seventy-seven thousand, eight hundred fifty-five".