131531293031 has 4 divisors (see below), whose sum is σ = 131537425752. Its totient is φ = 131525160312.

The previous prime is 131531293013. The next prime is 131531293037. The reversal of 131531293031 is 130392135131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131531293031 is a prime.

It is a super-2 number, since 2×131531293031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131531293037) 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, 3034076 + ... + 3077121.

It is an arithmetic number, because the mean of its divisors is an integer number (32884356438).

Almost surely, 2^131531293031 is an apocalyptic number.

131531293031 is a deficient number, since it is larger than the sum of its proper divisors (6132721).

131531293031 is an equidigital number, since it uses as much as digits as its factorization.

131531293031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132720.

The product of its (nonzero) digits is 7290, while the sum is 32.

The spelling of 131531293031 in words is "one hundred thirty-one billion, five hundred thirty-one million, two hundred ninety-three thousand, thirty-one".