31212968580 has 144 divisors (see below), whose sum is σ = 100020211200. Its totient is φ = 7857077760.

The previous prime is 31212968533. The next prime is 31212968581. The reversal of 31212968580 is 8586921213.

31212968580 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 2 + 9 + 68 + 580 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (31212968581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 944781 + ... + 977259.

It is an arithmetic number, because the mean of its divisors is an integer number (694584800).

Almost surely, 2^31212968580 is an apocalyptic number.

31212968580 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212968580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50010105600).

31212968580 is an abundant number, since it is smaller than the sum of its proper divisors (68807242620).

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

31212968580 is a wasteful number, since it uses less digits than its factorization.

31212968580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32794 (or 32789 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 31212968580 in words is "thirty-one billion, two hundred twelve million, nine hundred sixty-eight thousand, five hundred eighty".