312320020233281 has 2 divisors, whose sum is σ = 312320020233282. Its totient is φ = 312320020233280.

The previous prime is 312320020233259. The next prime is 312320020233391. The reversal of 312320020233281 is 182332020023213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303265367514256 + 9054652719025 = 17414516^2 + 3009095^2 .

It is an emirp because it is prime and its reverse (182332020023213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312320020233281 is a prime.

It is a super-2 number, since 2×312320020233281² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312320020233251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156160010116640 + 156160010116641.

It is an arithmetic number, because the mean of its divisors is an integer number (156160010116641).

Almost surely, 2^{312320020233281} is an apocalyptic number.

It is an amenable number.

312320020233281 is a deficient number, since it is larger than the sum of its proper divisors (1).

312320020233281 is an equidigital number, since it uses as much as digits as its factorization.

312320020233281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 312320020233281 its reverse (182332020023213), we get a palindrome (494652040256494).

The spelling of 312320020233281 in words is "three hundred twelve trillion, three hundred twenty billion, twenty million, two hundred thirty-three thousand, two hundred eighty-one".