31313439140 has 24 divisors (see below), whose sum is σ = 67879456512. Its totient is φ = 12121331040.

The previous prime is 31313439107. The next prime is 31313439167. The reversal of 31313439140 is 4193431313.

It is a junction number, because it is equal to n+sod(n) for n = 31313439097 and 31313439106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25252154 + ... + 25253393.

It is an arithmetic number, because the mean of its divisors is an integer number (2828310688).

Almost surely, 2^31313439140 is an apocalyptic number.

It is an amenable number.

31313439140 is an abundant number, since it is smaller than the sum of its proper divisors (36566017372).

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

31313439140 is a wasteful number, since it uses less digits than its factorization.

31313439140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50505587 (or 50505585 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 31313439140 in words is "thirty-one billion, three hundred thirteen million, four hundred thirty-nine thousand, one hundred forty".