313120220 has 24 divisors (see below), whose sum is σ = 751488864. Its totient is φ = 107355456.

The previous prime is 313120219. The next prime is 313120277. The reversal of 313120220 is 22021313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 313120195 and 313120204.

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, 1118147 + ... + 1118426.

It is an arithmetic number, because the mean of its divisors is an integer number (31312036).

Almost surely, 2^313120220 is an apocalyptic number.

It is an amenable number.

313120220 is an abundant number, since it is smaller than the sum of its proper divisors (438368644).

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

313120220 is a wasteful number, since it uses less digits than its factorization.

313120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236589 (or 2236587 counting only the distinct ones).

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

The square root of 313120220 is about 17695.2033048507. The cubic root of 313120220 is about 679.0530504279.

Adding to 313120220 its reverse (22021313), we get a palindrome (335141533).

The spelling of 313120220 in words is "three hundred thirteen million, one hundred twenty thousand, two hundred twenty".