55013139 has 12 divisors (see below), whose sum is σ = 84137976. Its totient is φ = 34517952.

The previous prime is 55013137. The next prime is 55013149. The reversal of 55013139 is 93131055.

It is not a de Polignac number, because 55013139 - 2¹ = 55013137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55013137) 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, 179629 + ... + 179934.

It is an arithmetic number, because the mean of its divisors is an integer number (7011498).

Almost surely, 2^55013139 is an apocalyptic number.

55013139 is a deficient number, since it is larger than the sum of its proper divisors (29124837).

55013139 is a wasteful number, since it uses less digits than its factorization.

55013139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359586 (or 359583 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 55013139 is about 7417.0842653970. The cubic root of 55013139 is about 380.3255266907.

It can be divided in two parts, 550 and 13139, that added together give a square (13689 = 117²).

The spelling of 55013139 in words is "fifty-five million, thirteen thousand, one hundred thirty-nine".