31012113144 has 16 divisors (see below), whose sum is σ = 77530282920. Its totient is φ = 10337371040.

The previous prime is 31012113137. The next prime is 31012113151. The reversal of 31012113144 is 44131121013.

It is an interprime number because it is at equal distance from previous prime (31012113137) and next prime (31012113151).

It is a self number, because there is not a number n which added to its sum of digits gives 31012113144.

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, 646085667 + ... + 646085714.

Almost surely, 2^31012113144 is an apocalyptic number.

It is an amenable number.

31012113144 is an abundant number, since it is smaller than the sum of its proper divisors (46518169776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31012113144 is a wasteful number, since it uses less digits than its factorization.

31012113144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292171390 (or 1292171386 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31012113144 its reverse (44131121013), we get a palindrome (75143234157).

The spelling of 31012113144 in words is "thirty-one billion, twelve million, one hundred thirteen thousand, one hundred forty-four".