313012220 has 24 divisors (see below), whose sum is σ = 665649600. Its totient is φ = 123619392.

The previous prime is 313012181. The next prime is 313012229. The reversal of 313012220 is 22210313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 313012195 and 313012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313012229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97475 + ... + 100634.

It is an arithmetic number, because the mean of its divisors is an integer number (27735400).

Almost surely, 2^313012220 is an apocalyptic number.

It is an amenable number.

313012220 is an abundant number, since it is smaller than the sum of its proper divisors (352637380).

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

313012220 is a wasteful number, since it uses less digits than its factorization.

313012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198197 (or 198195 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 313012220 is about 17692.1513672024. The cubic root of 313012220 is about 678.9749694885.

Adding to 313012220 its reverse (22210313), we get a palindrome (335222533).

The spelling of 313012220 in words is "three hundred thirteen million, twelve thousand, two hundred twenty".