131199523 has 16 divisors (see below), whose sum is σ = 170976960. Its totient is φ = 97698816.

The previous prime is 131199499. The next prime is 131199553. The reversal of 131199523 is 325991131.

It is a cyclic number.

It is not a de Polignac number, because 131199523 - 2⁵ = 131199491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131199553) 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, 40858 + ... + 43951.

It is an arithmetic number, because the mean of its divisors is an integer number (10686060).

Almost surely, 2^131199523 is an apocalyptic number.

131199523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131199523 is a deficient number, since it is larger than the sum of its proper divisors (39777437).

131199523 is a wasteful number, since it uses less digits than its factorization.

131199523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84846.

The product of its digits is 7290, while the sum is 34.

The square root of 131199523 is about 11454.2360286490. The cubic root of 131199523 is about 508.1330213060.

The spelling of 131199523 in words is "one hundred thirty-one million, one hundred ninety-nine thousand, five hundred twenty-three".