313211302220 has 96 divisors (see below), whose sum is σ = 707465041920. Its totient is φ = 116104147200.

The previous prime is 313211302213. The next prime is 313211302223. The reversal of 313211302220 is 22203112313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 313211302192 and 313211302201.

It is not an unprimeable number, because it can be changed into a prime (313211302223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47807945 + ... + 47814495.

It is an arithmetic number, because the mean of its divisors is an integer number (7369427520).

Almost surely, 2^313211302220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313211302220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353732520960).

313211302220 is an abundant number, since it is smaller than the sum of its proper divisors (394253739700).

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

313211302220 is a wasteful number, since it uses less digits than its factorization.

313211302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303 (or 9301 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 313211302220 its reverse (22203112313), we get a palindrome (335414414533).

The spelling of 313211302220 in words is "three hundred thirteen billion, two hundred eleven million, three hundred two thousand, two hundred twenty".