55139757 has 8 divisors (see below), whose sum is σ = 73650720. Its totient is φ = 36694320.

The previous prime is 55139743. The next prime is 55139779. The reversal of 55139757 is 75793155.

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

It is not a de Polignac number, because 55139757 - 2⁴ = 55139741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55139737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14382 + ... + 17807.

It is an arithmetic number, because the mean of its divisors is an integer number (9206340).

Almost surely, 2^55139757 is an apocalyptic number.

It is an amenable number.

55139757 is a deficient number, since it is larger than the sum of its proper divisors (18510963).

55139757 is a wasteful number, since it uses less digits than its factorization.

55139757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32763.

The product of its digits is 165375, while the sum is 42.

The square root of 55139757 is about 7425.6149240315. The cubic root of 55139757 is about 380.6170883087.

The spelling of 55139757 in words is "fifty-five million, one hundred thirty-nine thousand, seven hundred fifty-seven".