31302980685 has 128 divisors (see below), whose sum is σ = 61930344960. Its totient is φ = 14930915328.

The previous prime is 31302980669. The next prime is 31302980711. The reversal of 31302980685 is 58608920313.

It is a happy number.

It is not a de Polignac number, because 31302980685 - 2⁴ = 31302980669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 31302980685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3647059 + ... + 3655631.

It is an arithmetic number, because the mean of its divisors is an integer number (483830820).

Almost surely, 2^31302980685 is an apocalyptic number.

It is an amenable number.

31302980685 is a deficient number, since it is larger than the sum of its proper divisors (30627364275).

31302980685 is a wasteful number, since it uses less digits than its factorization.

31302980685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684 (or 8678 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 31302980685 in words is "thirty-one billion, three hundred two million, nine hundred eighty thousand, six hundred eighty-five".