31330613000 has 64 divisors (see below), whose sum is σ = 73599505200. Its totient is φ = 12483379200.

The previous prime is 31330612991. The next prime is 31330613011. The reversal of 31330613000 is 31603313.

It can be written as a sum of positive squares in 8 ways, for example, as 7355806756 + 23974806244 = 85766^2 + 154838^2 .

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

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, 196046 + ... + 317954.

Almost surely, 2^31330613000 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 31330613000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36799752600).

31330613000 is an abundant number, since it is smaller than the sum of its proper divisors (42268892200).

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

31330613000 is a wasteful number, since it uses less digits than its factorization.

31330613000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122187 (or 122173 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The spelling of 31330613000 in words is "thirty-one billion, three hundred thirty million, six hundred thirteen thousand".