55418139 has 12 divisors (see below), whose sum is σ = 91484016. Its totient is φ = 31667472.

The previous prime is 55418131. The next prime is 55418171. The reversal of 55418139 is 93181455.

55418139 is a `hidden beast` number, since 5 + 541 + 81 + 39 = 666.

It is not a de Polignac number, because 55418139 - 2³ = 55418131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55418131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439764 + ... + 439889.

It is an arithmetic number, because the mean of its divisors is an integer number (7623668).

Almost surely, 2^55418139 is an apocalyptic number.

55418139 is a deficient number, since it is larger than the sum of its proper divisors (36065877).

55418139 is a wasteful number, since it uses less digits than its factorization.

55418139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879666 (or 879663 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 55418139 is about 7444.3360348657. The cubic root of 55418139 is about 381.2565490589.

The spelling of 55418139 in words is "fifty-five million, four hundred eighteen thousand, one hundred thirty-nine".