31322621012640 has 192 divisors, whose sum is σ = 101857190141952. Its totient is φ = 8082610099200.

The previous prime is 31322621012587. The next prime is 31322621012677. The reversal of 31322621012640 is 4621012622313.

It is a super-2 number, since 2×31322621012640² (a number of 28 digits) contains 22 as substring.

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, 202156639 + ... + 202311521.

It is an arithmetic number, because the mean of its divisors is an integer number (530506198656).

Almost surely, 2^{31322621012640} is an apocalyptic number.

31322621012640 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 31322621012640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50928595070976).

31322621012640 is an abundant number, since it is smaller than the sum of its proper divisors (70534569129312).

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

31322621012640 is a wasteful number, since it uses less digits than its factorization.

31322621012640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168523 (or 168515 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 31322621012640 its reverse (4621012622313), we get a palindrome (35943633634953).

The spelling of 31322621012640 in words is "thirty-one trillion, three hundred twenty-two billion, six hundred twenty-one million, twelve thousand, six hundred forty".