131242356564 has 24 divisors (see below), whose sum is σ = 334071453408. Its totient is φ = 39770411040.

The previous prime is 131242356551. The next prime is 131242356577. The reversal of 131242356564 is 465653242131.

It is an interprime number because it is at equal distance from previous prime (131242356551) and next prime (131242356577).

It is a super-2 number, since 2×131242356564² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497130007 + ... + 497130270.

It is an arithmetic number, because the mean of its divisors is an integer number (13919643892).

Almost surely, 2^131242356564 is an apocalyptic number.

It is an amenable number.

131242356564 is an abundant number, since it is smaller than the sum of its proper divisors (202829096844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131242356564 is a wasteful number, since it uses less digits than its factorization.

131242356564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994260295 (or 994260293 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

Adding to 131242356564 its reverse (465653242131), we get a palindrome (596895598695).

The spelling of 131242356564 in words is "one hundred thirty-one billion, two hundred forty-two million, three hundred fifty-six thousand, five hundred sixty-four".