313212131 has 12 divisors (see below), whose sum is σ = 350237880. Its totient is φ = 279267840.

The previous prime is 313212077. The next prime is 313212227. The reversal of 313212131 is 131212313.

It is a de Polignac number, because none of the positive numbers 2^k-313212131 is a prime.

It is a super-2 number, since 2×313212131² = 196203678011122322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313212631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23030 + ... + 34011.

It is an arithmetic number, because the mean of its divisors is an integer number (29186490).

Almost surely, 2^313212131 is an apocalyptic number.

313212131 is a deficient number, since it is larger than the sum of its proper divisors (37025749).

313212131 is a wasteful number, since it uses less digits than its factorization.

313212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57094 (or 57077 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 313212131 is about 17697.8001740329. The cubic root of 313212131 is about 679.1194853361.

Adding to 313212131 its reverse (131212313), we get a palindrome (444424444).

The spelling of 313212131 in words is "three hundred thirteen million, two hundred twelve thousand, one hundred thirty-one".