313123212 has 48 divisors (see below), whose sum is σ = 829086720. Its totient is φ = 102152016.

The previous prime is 313123201. The next prime is 313123229. The reversal of 313123212 is 212321313.

313123212 is a `hidden beast` number, since 31 + 312 + 321 + 2 = 666.

It is a super-2 number, since 2×313123212² = 196092291786393888, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25768 + ... + 35919.

It is an arithmetic number, because the mean of its divisors is an integer number (17272640).

Almost surely, 2^313123212 is an apocalyptic number.

It is an amenable number.

313123212 is an abundant number, since it is smaller than the sum of its proper divisors (515963508).

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

313123212 is a wasteful number, since it uses less digits than its factorization.

313123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61747 (or 61739 counting only the distinct ones).

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

The square root of 313123212 is about 17695.2878473338. The cubic root of 313123212 is about 679.0552133035.

Adding to 313123212 its reverse (212321313), we get a palindrome (525444525).

The spelling of 313123212 in words is "three hundred thirteen million, one hundred twenty-three thousand, two hundred twelve".