312320431 has 2 divisors, whose sum is σ = 312320432. Its totient is φ = 312320430.

The previous prime is 312320419. The next prime is 312320471. The reversal of 312320431 is 134023213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312320431 - 2⁵ = 312320399 is a prime.

It is a super-2 number, since 2×312320431² = 195088103240051522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312320399 and 312320408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312320471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156160215 + 156160216.

It is an arithmetic number, because the mean of its divisors is an integer number (156160216).

Almost surely, 2^312320431 is an apocalyptic number.

312320431 is a deficient number, since it is larger than the sum of its proper divisors (1).

312320431 is an equidigital number, since it uses as much as digits as its factorization.

312320431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 312320431 is about 17672.5898215287. The cubic root of 312320431 is about 678.4743991758.

Adding to 312320431 its reverse (134023213), we get a palindrome (446343644).

The spelling of 312320431 in words is "three hundred twelve million, three hundred twenty thousand, four hundred thirty-one".