31143140312 has 16 divisors (see below), whose sum is σ = 61466724600. Its totient is φ = 14752013760.

The previous prime is 31143140261. The next prime is 31143140387. The reversal of 31143140312 is 21304134113.

It is a congruent number.

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, 102444389 + ... + 102444692.

Almost surely, 2^31143140312 is an apocalyptic number.

It is an amenable number.

31143140312 is a deficient number, since it is larger than the sum of its proper divisors (30323584288).

31143140312 is a wasteful number, since it uses less digits than its factorization.

31143140312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204889106 (or 204889102 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31143140312 its reverse (21304134113), we get a palindrome (52447274425).

The spelling of 31143140312 in words is "thirty-one billion, one hundred forty-three million, one hundred forty thousand, three hundred twelve".