55185057 has 48 divisors (see below), whose sum is σ = 88058880. Its totient is φ = 34473600.

The previous prime is 55185049. The next prime is 55185059. The reversal of 55185057 is 75058155.

55185057 is a `hidden beast` number, since 551 + 8 + 50 + 57 = 666.

It is not a de Polignac number, because 55185057 - 2³ = 55185049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55185059) 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 47 ways as a sum of consecutive naturals, for example, 288832 + ... + 289022.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^55185057 is an apocalyptic number.

It is an amenable number.

55185057 is a deficient number, since it is larger than the sum of its proper divisors (32873823).

55185057 is a wasteful number, since it uses less digits than its factorization.

55185057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 36.

The square root of 55185057 is about 7428.6645502405. The cubic root of 55185057 is about 380.7212916125.

The spelling of 55185057 in words is "fifty-five million, one hundred eighty-five thousand, fifty-seven".