131431242561 has 32 divisors (see below), whose sum is σ = 187821696000. Its totient is φ = 81502106688.

The previous prime is 131431242559. The next prime is 131431242589. The reversal of 131431242561 is 165242134131.

It is not a de Polignac number, because 131431242561 - 2¹ = 131431242559 is a prime.

It is a super-2 number, since 2×131431242561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131431242161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2764356 + ... + 2811498.

It is an arithmetic number, because the mean of its divisors is an integer number (5869428000).

Almost surely, 2^131431242561 is an apocalyptic number.

It is an amenable number.

131431242561 is a deficient number, since it is larger than the sum of its proper divisors (56390453439).

131431242561 is a wasteful number, since it uses less digits than its factorization.

131431242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48053.

The product of its digits is 17280, while the sum is 33.

Adding to 131431242561 its reverse (165242134131), we get a palindrome (296673376692).

The spelling of 131431242561 in words is "one hundred thirty-one billion, four hundred thirty-one million, two hundred forty-two thousand, five hundred sixty-one".