131518531911 has 32 divisors (see below), whose sum is σ = 193528101312. Its totient is φ = 78929879040.

The previous prime is 131518531901. The next prime is 131518531913. The reversal of 131518531911 is 119135815131.

It is a happy number.

It is not a de Polignac number, because 131518531911 - 2¹⁵ = 131518499143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 131518531911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131518531913) 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, 4515451 + ... + 4544483.

It is an arithmetic number, because the mean of its divisors is an integer number (6047753166).

Almost surely, 2^131518531911 is an apocalyptic number.

131518531911 is a deficient number, since it is larger than the sum of its proper divisors (62009569401).

131518531911 is a wasteful number, since it uses less digits than its factorization.

131518531911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31923.

The product of its digits is 16200, while the sum is 39.

The spelling of 131518531911 in words is "one hundred thirty-one billion, five hundred eighteen million, five hundred thirty-one thousand, nine hundred eleven".