31916323290 has 32 divisors (see below), whose sum is σ = 79929576576. Its totient is φ = 8140975040.

The previous prime is 31916323237. The next prime is 31916323337. The reversal of 31916323290 is 9232361913.

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, 23127081 + ... + 23128460.

It is an arithmetic number, because the mean of its divisors is an integer number (2497799268).

Almost surely, 2^31916323290 is an apocalyptic number.

31916323290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31916323290 is an abundant number, since it is smaller than the sum of its proper divisors (48013253286).

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

31916323290 is a wasteful number, since it uses less digits than its factorization.

31916323290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46255574.

The product of its (nonzero) digits is 52488, while the sum is 39.

The spelling of 31916323290 in words is "thirty-one billion, nine hundred sixteen million, three hundred twenty-three thousand, two hundred ninety".