312323431 has 4 divisors (see below), whose sum is σ = 356941072. Its totient is φ = 267705792.

The previous prime is 312323423. The next prime is 312323437. The reversal of 312323431 is 134323213.

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 312323431 - 2³ = 312323423 is a prime.

It is a super-2 number, since 2×312323431² = 195091851103223522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312323437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22308810 + ... + 22308823.

It is an arithmetic number, because the mean of its divisors is an integer number (89235268).

Almost surely, 2^312323431 is an apocalyptic number.

312323431 is a deficient number, since it is larger than the sum of its proper divisors (44617641).

312323431 is an equidigital number, since it uses as much as digits as its factorization.

312323431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44617640.

The product of its digits is 1296, while the sum is 22.

The square root of 312323431 is about 17672.6746985282. The cubic root of 312323431 is about 678.4765715352.

Adding to 312323431 its reverse (134323213), we get a palindrome (446646644).

The spelling of 312323431 in words is "three hundred twelve million, three hundred twenty-three thousand, four hundred thirty-one".