131255520031 has 4 divisors (see below), whose sum is σ = 138976432992. Its totient is φ = 123534607072.

The previous prime is 131255519971. The next prime is 131255520037. The reversal of 131255520031 is 130025552131.

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

It is a cyclic number.

It is not a de Polignac number, because 131255520031 - 2¹⁵ = 131255487263 is a prime.

It is a super-2 number, since 2×131255520031² (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 (131255520037) 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, 3860456455 + ... + 3860456488.

It is an arithmetic number, because the mean of its divisors is an integer number (34744108248).

Almost surely, 2^131255520031 is an apocalyptic number.

131255520031 is a deficient number, since it is larger than the sum of its proper divisors (7720912961).

131255520031 is an equidigital number, since it uses as much as digits as its factorization.

131255520031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720912960.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 131255520031 in words is "one hundred thirty-one billion, two hundred fifty-five million, five hundred twenty thousand, thirty-one".