31320314420 has 24 divisors (see below), whose sum is σ = 65879286984. Its totient is φ = 12507815936.

The previous prime is 31320314341. The next prime is 31320314449. The reversal of 31320314420 is 2441302313.

It can be written as a sum of positive squares in 4 ways, for example, as 3065393956 + 28254920464 = 55366^2 + 168092^2 .

It is a congruent number.

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, 1256717 + ... + 1281396.

It is an arithmetic number, because the mean of its divisors is an integer number (2744970291).

Almost surely, 2^31320314420 is an apocalyptic number.

It is an amenable number.

31320314420 is an abundant number, since it is smaller than the sum of its proper divisors (34558972564).

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

31320314420 is a wasteful number, since it uses less digits than its factorization.

31320314420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538739 (or 2538737 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31320314420 its reverse (2441302313), we get a palindrome (33761616733).

The spelling of 31320314420 in words is "thirty-one billion, three hundred twenty million, three hundred fourteen thousand, four hundred twenty".