31313310412220 has 24 divisors (see below), whose sum is σ = 65785922169408. Its totient is φ = 12519996488000.

The previous prime is 31313310412199. The next prime is 31313310412253. The reversal of 31313310412220 is 2221401331313.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31313310412220.

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, 332931611 + ... + 333025650.

It is an arithmetic number, because the mean of its divisors is an integer number (2741080090392).

Almost surely, 2^{31313310412220} is an apocalyptic number.

It is an amenable number.

31313310412220 is an abundant number, since it is smaller than the sum of its proper divisors (34472611757188).

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

31313310412220 is a wasteful number, since it uses less digits than its factorization.

31313310412220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665959621 (or 665959619 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31313310412220 its reverse (2221401331313), we get a palindrome (33534711743533).

The spelling of 31313310412220 in words is "thirty-one trillion, three hundred thirteen billion, three hundred ten million, four hundred twelve thousand, two hundred twenty".