31130869785 has 16 divisors (see below), whose sum is σ = 49821232704. Its totient is φ = 16599183552.

The previous prime is 31130869741. The next prime is 31130869813. The reversal of 31130869785 is 58796803113.

It is not a de Polignac number, because 31130869785 - 2⁷ = 31130869657 is a prime.

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, 180922 + ... + 308211.

It is an arithmetic number, because the mean of its divisors is an integer number (3113827044).

Almost surely, 2^31130869785 is an apocalyptic number.

It is an amenable number.

31130869785 is a deficient number, since it is larger than the sum of its proper divisors (18690362919).

31130869785 is a wasteful number, since it uses less digits than its factorization.

31130869785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493384.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 31130869785 in words is "thirty-one billion, one hundred thirty million, eight hundred sixty-nine thousand, seven hundred eighty-five".