312243457 has 2 divisors, whose sum is σ = 312243458. Its totient is φ = 312243456.

The previous prime is 312243401. The next prime is 312243461. The reversal of 312243457 is 754342213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234733041 + 77510416 = 15321^2 + 8804^2 .

It is a cyclic number.

It is not a de Polignac number, because 312243457 - 2⁷ = 312243329 is a prime.

It is not a weakly prime, because it can be changed into another prime (312243467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156121728 + 156121729.

It is an arithmetic number, because the mean of its divisors is an integer number (156121729).

Almost surely, 2^312243457 is an apocalyptic number.

It is an amenable number.

312243457 is a deficient number, since it is larger than the sum of its proper divisors (1).

312243457 is an equidigital number, since it uses as much as digits as its factorization.

312243457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 312243457 is about 17670.4119080456. The cubic root of 312243457 is about 678.4186560199.

The spelling of 312243457 in words is "three hundred twelve million, two hundred forty-three thousand, four hundred fifty-seven".