55139974 has 8 divisors (see below), whose sum is σ = 84066048. Its totient is φ = 27117960.

The previous prime is 55139969. The next prime is 55140011. The reversal of 55139974 is 47993155.

55139974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55139974.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225862 + ... + 226105.

It is an arithmetic number, because the mean of its divisors is an integer number (10508256).

Almost surely, 2^55139974 is an apocalyptic number.

55139974 is a deficient number, since it is larger than the sum of its proper divisors (28926074).

55139974 is a wasteful number, since it uses less digits than its factorization.

55139974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452030.

The product of its digits is 170100, while the sum is 43.

The square root of 55139974 is about 7425.6295356017. The cubic root of 55139974 is about 380.6175876084.

The spelling of 55139974 in words is "fifty-five million, one hundred thirty-nine thousand, nine hundred seventy-four".