31320420330052 has 48 divisors (see below), whose sum is σ = 64461973137408. Its totient is φ = 13037154867360.

The previous prime is 31320420330047. The next prime is 31320420330091. The reversal of 31320420330052 is 25003302402313.

It is a super-2 number, since 2×31320420330052² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 31320420330052.

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, 90666198 + ... + 91010989.

It is an arithmetic number, because the mean of its divisors is an integer number (1342957773696).

Almost surely, 2^{31320420330052} is an apocalyptic number.

It is an amenable number.

31320420330052 is an abundant number, since it is smaller than the sum of its proper divisors (33141552807356).

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

31320420330052 is a wasteful number, since it uses less digits than its factorization.

31320420330052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181677376 (or 181677374 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 31320420330052 its reverse (25003302402313), we get a palindrome (56323722732365).

The spelling of 31320420330052 in words is "thirty-one trillion, three hundred twenty billion, four hundred twenty million, three hundred thirty thousand, fifty-two".