31302231020 has 24 divisors (see below), whose sum is σ = 66252286464. Its totient is φ = 12422301696.

The previous prime is 31302231013. The next prime is 31302231047. The reversal of 31302231020 is 2013220313.

It is a self number, because there is not a number n which added to its sum of digits gives 31302231020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6159317 + ... + 6164396.

It is an arithmetic number, because the mean of its divisors is an integer number (2760511936).

Almost surely, 2^31302231020 is an apocalyptic number.

It is an amenable number.

31302231020 is an abundant number, since it is smaller than the sum of its proper divisors (34950055444).

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

31302231020 is a wasteful number, since it uses less digits than its factorization.

31302231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12323849 (or 12323847 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31302231020 its reverse (2013220313), we get a palindrome (33315451333).

The spelling of 31302231020 in words is "thirty-one billion, three hundred two million, two hundred thirty-one thousand, twenty".