312231297 has 16 divisors (see below), whose sum is σ = 476530560. Its totient is φ = 178136832.

The previous prime is 312231251. The next prime is 312231331. The reversal of 312231297 is 792132213.

It is not a de Polignac number, because 312231297 - 2¹⁰ = 312230273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312231217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2329 + ... + 25097.

It is an arithmetic number, because the mean of its divisors is an integer number (29783160).

Almost surely, 2^312231297 is an apocalyptic number.

It is an amenable number.

312231297 is a deficient number, since it is larger than the sum of its proper divisors (164299263).

312231297 is a wasteful number, since it uses less digits than its factorization.

312231297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23432.

The product of its digits is 4536, while the sum is 30.

The square root of 312231297 is about 17670.0678266950. The cubic root of 312231297 is about 678.4098491336.

It can be divided in two parts, 31 and 2231297, that added together give a triangular number (2231328 = T₂₁₁₂).

The spelling of 312231297 in words is "three hundred twelve million, two hundred thirty-one thousand, two hundred ninety-seven".