131445562631 has 4 divisors (see below), whose sum is σ = 132282795672. Its totient is φ = 130608329592.

The previous prime is 131445562613. The next prime is 131445562639. The reversal of 131445562631 is 136265544131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136265544131 = 17 ⋅8015620243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131445562631 is a prime.

It is a super-2 number, since 2×131445562631² (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 (131445562639) 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, 418616285 + ... + 418616598.

It is an arithmetic number, because the mean of its divisors is an integer number (33070698918).

Almost surely, 2^131445562631 is an apocalyptic number.

131445562631 is a deficient number, since it is larger than the sum of its proper divisors (837233041).

131445562631 is an equidigital number, since it uses as much as digits as its factorization.

131445562631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837233040.

The product of its digits is 259200, while the sum is 41.

The spelling of 131445562631 in words is "one hundred thirty-one billion, four hundred forty-five million, five hundred sixty-two thousand, six hundred thirty-one".