31000123302320 has 160 divisors (see below), whose sum is σ = 73622487859200. Its totient is φ = 12137056468992.

The previous prime is 31000123302311. The next prime is 31000123302347. The reversal of 31000123302320 is 2320332100013.

It is a super-2 number, since 2×31000123302320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31000123302292 and 31000123302301.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336791024 + ... + 336883056.

It is an arithmetic number, because the mean of its divisors is an integer number (460140549120).

Almost surely, 2^{31000123302320} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31000123302320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36811243929600).

31000123302320 is an abundant number, since it is smaller than the sum of its proper divisors (42622364556880).

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

31000123302320 is a wasteful number, since it uses less digits than its factorization.

31000123302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92587 (or 92581 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31000123302320 its reverse (2320332100013), we get a palindrome (33320455402333).

The spelling of 31000123302320 in words is "thirty-one trillion, one hundred twenty-three million, three hundred two thousand, three hundred twenty".