312392509243 has 2 divisors, whose sum is σ = 312392509244. Its totient is φ = 312392509242.

The previous prime is 312392509237. The next prime is 312392509349. The reversal of 312392509243 is 342905293213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312392509243 - 2²¹ = 312390412091 is a prime.

It is a super-2 number, since 2×312392509243² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312392509243.

It is not a weakly prime, because it can be changed into another prime (312392509223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156196254621 + 156196254622.

It is an arithmetic number, because the mean of its divisors is an integer number (156196254622).

Almost surely, 2^312392509243 is an apocalyptic number.

312392509243 is a deficient number, since it is larger than the sum of its proper divisors (1).

312392509243 is an equidigital number, since it uses as much as digits as its factorization.

312392509243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 312392509243 in words is "three hundred twelve billion, three hundred ninety-two million, five hundred nine thousand, two hundred forty-three".