312542631326281 has 2 divisors, whose sum is σ = 312542631326282. Its totient is φ = 312542631326280.

The previous prime is 312542631326279. The next prime is 312542631326327. The reversal of 312542631326281 is 182623136245213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285571435501881 + 26971195824400 = 16898859^2 + 5193380^2 .

It is a cyclic number.

It is not a de Polignac number, because 312542631326281 - 2¹ = 312542631326279 is a prime.

It is a super-2 number, since 2×312542631326281² (a number of 30 digits) contains 22 as substring.

Together with 312542631326279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312542631326221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156271315663140 + 156271315663141.

It is an arithmetic number, because the mean of its divisors is an integer number (156271315663141).

Almost surely, 2^{312542631326281} is an apocalyptic number.

It is an amenable number.

312542631326281 is a deficient number, since it is larger than the sum of its proper divisors (1).

312542631326281 is an equidigital number, since it uses as much as digits as its factorization.

312542631326281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 49.

The spelling of 312542631326281 in words is "three hundred twelve trillion, five hundred forty-two billion, six hundred thirty-one million, three hundred twenty-six thousand, two hundred eighty-one".