312313231 has 4 divisors (see below), whose sum is σ = 315178600. Its totient is φ = 309447864.

The previous prime is 312313223. The next prime is 312313237. The reversal of 312313231 is 132313213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312313231 - 2³ = 312313223 is a prime.

It is a super-2 number, since 2×312313231² = 195079108515318722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312313199 and 312313208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312313237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432521 + ... + 1432738.

It is an arithmetic number, because the mean of its divisors is an integer number (78794650).

Almost surely, 2^312313231 is an apocalyptic number.

312313231 is a deficient number, since it is larger than the sum of its proper divisors (2865369).

312313231 is a wasteful number, since it uses less digits than its factorization.

312313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865368.

The product of its digits is 324, while the sum is 19.

The square root of 312313231 is about 17672.3861150666. The cubic root of 312313231 is about 678.4691854565.

Adding to 312313231 its reverse (132313213), we get a palindrome (444626444).

The spelling of 312313231 in words is "three hundred twelve million, three hundred thirteen thousand, two hundred thirty-one".