312321031 has 8 divisors (see below), whose sum is σ = 358646400. Its totient is φ = 268984440.

The previous prime is 312321017. The next prime is 312321041. The reversal of 312321031 is 130123213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312321031 - 2⁵ = 312320999 is a prime.

It is a super-2 number, since 2×312321031² = 195088852809805922, 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 = 312320996 and 312321014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312321011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 746971 + ... + 747388.

It is an arithmetic number, because the mean of its divisors is an integer number (44830800).

Almost surely, 2^312321031 is an apocalyptic number.

312321031 is a deficient number, since it is larger than the sum of its proper divisors (46325369).

312321031 is a wasteful number, since it uses less digits than its factorization.

312321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494389.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312321031 is about 17672.6067969612. The cubic root of 312321031 is about 678.4748336488.

Adding to 312321031 its reverse (130123213), we get a palindrome (442444244).

The spelling of 312321031 in words is "three hundred twelve million, three hundred twenty-one thousand, thirty-one".