31312819144 has 64 divisors (see below), whose sum is σ = 60629869440. Its totient is φ = 15154076160.

The previous prime is 31312819127. The next prime is 31312819199. The reversal of 31312819144 is 44191821313.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22905549 + ... + 22906915.

It is an arithmetic number, because the mean of its divisors is an integer number (947341710).

Almost surely, 2^31312819144 is an apocalyptic number.

It is an amenable number.

31312819144 is a deficient number, since it is larger than the sum of its proper divisors (29317050296).

31312819144 is a wasteful number, since it uses less digits than its factorization.

31312819144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150 (or 2146 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The spelling of 31312819144 in words is "thirty-one billion, three hundred twelve million, eight hundred nineteen thousand, one hundred forty-four".