13550139 has 32 divisors (see below), whose sum is σ = 21695040. Its totient is φ = 8326656.

The previous prime is 13550129. The next prime is 13550143. The reversal of 13550139 is 93105531.

13550139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13550139 - 2⁴ = 13550123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13550129) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 24049 + ... + 24605.

It is an arithmetic number, because the mean of its divisors is an integer number (677970).

Almost surely, 2^13550139 is an apocalyptic number.

13550139 is a deficient number, since it is larger than the sum of its proper divisors (8144901).

13550139 is a wasteful number, since it uses less digits than its factorization.

13550139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 630 counting only the distinct ones).

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

The square root of 13550139 is about 3681.0513443852. The cubic root of 13550139 is about 238.4045739836.

It can be divided in two parts, 13550 and 139, that added together give a square (13689 = 117²).

The spelling of 13550139 in words is "thirteen million, five hundred fifty thousand, one hundred thirty-nine".