131512339 has 4 divisors (see below), whose sum is σ = 150299824. Its totient is φ = 112724856.

The previous prime is 131512331. The next prime is 131512343. The reversal of 131512339 is 933215131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933215131 = 6803 ⋅137177.

It is a cyclic number.

It is not a de Polignac number, because 131512339 - 2³ = 131512331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131512331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9393732 + ... + 9393745.

It is an arithmetic number, because the mean of its divisors is an integer number (37574956).

Almost surely, 2^131512339 is an apocalyptic number.

131512339 is a deficient number, since it is larger than the sum of its proper divisors (18787485).

131512339 is an equidigital number, since it uses as much as digits as its factorization.

131512339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18787484.

The product of its digits is 2430, while the sum is 28.

The square root of 131512339 is about 11467.8829345263. The cubic root of 131512339 is about 508.5365440577.

The spelling of 131512339 in words is "one hundred thirty-one million, five hundred twelve thousand, three hundred thirty-nine".