313112220 has 24 divisors (see below), whose sum is σ = 876714384. Its totient is φ = 83496576.

The previous prime is 313112161. The next prime is 313112249. The reversal of 313112220 is 22211313.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 313112220.

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, 2609209 + ... + 2609328.

It is an arithmetic number, because the mean of its divisors is an integer number (36529766).

Almost surely, 2^313112220 is an apocalyptic number.

313112220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313112220 is an abundant number, since it is smaller than the sum of its proper divisors (563602164).

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

313112220 is a wasteful number, since it uses less digits than its factorization.

313112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218549 (or 5218547 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 313112220 is about 17694.9772534468. The cubic root of 313112220 is about 679.0472672704.

Adding to 313112220 its reverse (22211313), we get a palindrome (335323533).

It can be divided in two parts, 3131 and 12220, that added together give a palindrome (15351).

The spelling of 313112220 in words is "three hundred thirteen million, one hundred twelve thousand, two hundred twenty".