313012031220 has 144 divisors (see below), whose sum is σ = 1090562054400. Its totient is φ = 71186024448.

The previous prime is 313012031219. The next prime is 313012031237. The reversal of 313012031220 is 22130210313.

313012031220 is a `hidden beast` number, since 31 + 301 + 2 + 0 + 312 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 313012031193 and 313012031202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373437 + ... + 874916.

It is an arithmetic number, because the mean of its divisors is an integer number (7573347600).

Almost surely, 2^313012031220 is an apocalyptic number.

313012031220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313012031220 is an abundant number, since it is smaller than the sum of its proper divisors (777550023180).

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

313012031220 is a wasteful number, since it uses less digits than its factorization.

313012031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248574 (or 1248569 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 313012031220 its reverse (22130210313), we get a palindrome (335142241533).

The spelling of 313012031220 in words is "three hundred thirteen billion, twelve million, thirty-one thousand, two hundred twenty".