131331230531 has 2 divisors, whose sum is σ = 131331230532. Its totient is φ = 131331230530.

The previous prime is 131331230491. The next prime is 131331230539. The reversal of 131331230531 is 135032133131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131331230531 - 2¹⁸ = 131330968387 is a prime.

It is a super-2 number, since 2×131331230531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131331230531.

It is not a weakly prime, because it can be changed into another prime (131331230539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665615265 + 65665615266.

It is an arithmetic number, because the mean of its divisors is an integer number (65665615266).

Almost surely, 2^131331230531 is an apocalyptic number.

131331230531 is a deficient number, since it is larger than the sum of its proper divisors (1).

131331230531 is an equidigital number, since it uses as much as digits as its factorization.

131331230531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 131331230531 its reverse (135032133131), we get a palindrome (266363363662).

The spelling of 131331230531 in words is "one hundred thirty-one billion, three hundred thirty-one million, two hundred thirty thousand, five hundred thirty-one".