31313000010220 has 24 divisors (see below), whose sum is σ = 66835288549008. Its totient is φ = 12319868856000.

The previous prime is 31313000010179. The next prime is 31313000010301. The reversal of 31313000010220 is 2201000031313.

It is a junction number, because it is equal to n+sod(n) for n = 31313000010194 and 31313000010203.

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, 12833195506 + ... + 12833197945.

It is an arithmetic number, because the mean of its divisors is an integer number (2784803689542).

Almost surely, 2^{31313000010220} is an apocalyptic number.

It is an amenable number.

31313000010220 is an abundant number, since it is smaller than the sum of its proper divisors (35522288538788).

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

31313000010220 is a wasteful number, since it uses less digits than its factorization.

31313000010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25666393521 (or 25666393519 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31313000010220 its reverse (2201000031313), we get a palindrome (33514000041533).

The spelling of 31313000010220 in words is "thirty-one trillion, three hundred thirteen billion, ten thousand, two hundred twenty".