31000332102320 has 40 divisors (see below), whose sum is σ = 82372311016224. Its totient is φ = 10628685292032.

The previous prime is 31000332102263. The next prime is 31000332102359. The reversal of 31000332102320 is 2320123300013.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×31000332102320² (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 = 31000332102292 and 31000332102301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27678867389 + ... + 27678868508.

Almost surely, 2^{31000332102320} is an apocalyptic number.

It is an amenable number.

31000332102320 is an abundant number, since it is smaller than the sum of its proper divisors (51371978913904).

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

31000332102320 is a wasteful number, since it uses less digits than its factorization.

31000332102320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55357735917 (or 55357735911 counting only the distinct ones).

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

Adding to 31000332102320 its reverse (2320123300013), we get a palindrome (33320455402333).

The spelling of 31000332102320 in words is "thirty-one trillion, three hundred thirty-two million, one hundred two thousand, three hundred twenty".