131200139 has 16 divisors (see below), whose sum is σ = 152053440. Its totient is φ = 110885760.

The previous prime is 131200117. The next prime is 131200141. The reversal of 131200139 is 931002131.

131200139 = T₁₆₂ + T₁₆₃ + ... + T₉₂₄.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131200139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131200139.

It is not an unprimeable number, because it can be changed into a prime (131200109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284369 + ... + 284829.

It is an arithmetic number, because the mean of its divisors is an integer number (9503340).

Almost surely, 2^131200139 is an apocalyptic number.

131200139 is a deficient number, since it is larger than the sum of its proper divisors (20853301).

131200139 is a wasteful number, since it uses less digits than its factorization.

131200139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 131200139 is about 11454.2629182327. The cubic root of 131200139 is about 508.1338165565.

The spelling of 131200139 in words is "one hundred thirty-one million, two hundred thousand, one hundred thirty-nine".