31320143740 has 24 divisors (see below), whose sum is σ = 68631968160. Its totient is φ = 11983359168.

The previous prime is 31320143713. The next prime is 31320143759. The reversal of 31320143740 is 4734102313.

It is a super-2 number, since 2×31320143740² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320143699 and 31320143708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34043175 + ... + 34044094.

It is an arithmetic number, because the mean of its divisors is an integer number (2859665340).

Almost surely, 2^31320143740 is an apocalyptic number.

It is an amenable number.

31320143740 is an abundant number, since it is smaller than the sum of its proper divisors (37311824420).

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

31320143740 is a wasteful number, since it uses less digits than its factorization.

31320143740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68087301 (or 68087299 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The spelling of 31320143740 in words is "thirty-one billion, three hundred twenty million, one hundred forty-three thousand, seven hundred forty".