16131131312 has 20 divisors (see below), whose sum is σ = 31364514120. Its totient is φ = 8037063168.

The previous prime is 16131131299. The next prime is 16131131321. The reversal of 16131131312 is 21313113161.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776737 + ... + 1785792.

It is an arithmetic number, because the mean of its divisors is an integer number (1568225706).

Almost surely, 2^16131131312 is an apocalyptic number.

It is an amenable number.

16131131312 is a deficient number, since it is larger than the sum of its proper divisors (15233382808).

16131131312 is a wasteful number, since it uses less digits than its factorization.

16131131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562820 (or 3562814 counting only the distinct ones).

The product of its digits is 324, while the sum is 23.

Adding to 16131131312 its reverse (21313113161), we get a palindrome (37444244473).

The spelling of 16131131312 in words is "sixteen billion, one hundred thirty-one million, one hundred thirty-one thousand, three hundred twelve".