31139381296 has 40 divisors (see below), whose sum is σ = 60740755200. Its totient is φ = 15464554560.

The previous prime is 31139381293. The next prime is 31139381311. The reversal of 31139381296 is 69218393113.

It is a super-2 number, since 2×31139381296² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31139381293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626101 + ... + 2637931.

It is an arithmetic number, because the mean of its divisors is an integer number (1518518880).

Almost surely, 2^31139381296 is an apocalyptic number.

It is an amenable number.

31139381296 is a deficient number, since it is larger than the sum of its proper divisors (29601373904).

31139381296 is a wasteful number, since it uses less digits than its factorization.

31139381296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12937 (or 12931 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The spelling of 31139381296 in words is "thirty-one billion, one hundred thirty-nine million, three hundred eighty-one thousand, two hundred ninety-six".