31377143236 has 12 divisors (see below), whose sum is σ = 58140000828. Its totient is φ = 14765714432.

The previous prime is 31377143227. The next prime is 31377143261. The reversal of 31377143236 is 63234177313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25698013636 + 5679129600 = 160306^2 + 75360^2 .

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, 230714221 + ... + 230714356.

It is an arithmetic number, because the mean of its divisors is an integer number (4845000069).

Almost surely, 2^31377143236 is an apocalyptic number.

It is an amenable number.

31377143236 is a deficient number, since it is larger than the sum of its proper divisors (26762857592).

31377143236 is a wasteful number, since it uses less digits than its factorization.

31377143236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461428598 (or 461428596 counting only the distinct ones).

The product of its digits is 190512, while the sum is 40.

The spelling of 31377143236 in words is "thirty-one billion, three hundred seventy-seven million, one hundred forty-three thousand, two hundred thirty-six".