55179139 has 4 divisors (see below), whose sum is σ = 57578256. Its totient is φ = 52780024.

The previous prime is 55179053. The next prime is 55179149. The reversal of 55179139 is 93197155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55179139 - 2⁷ = 55179011 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55179149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199524 + ... + 1199569.

It is an arithmetic number, because the mean of its divisors is an integer number (14394564).

Almost surely, 2^55179139 is an apocalyptic number.

55179139 is a deficient number, since it is larger than the sum of its proper divisors (2399117).

55179139 is a wasteful number, since it uses less digits than its factorization.

55179139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399116.

The product of its digits is 42525, while the sum is 40.

The square root of 55179139 is about 7428.2662176311. The cubic root of 55179139 is about 380.7076817135.

The spelling of 55179139 in words is "fifty-five million, one hundred seventy-nine thousand, one hundred thirty-nine".