321512060257 has 2 divisors, whose sum is σ = 321512060258. Its totient is φ = 321512060256.

The previous prime is 321512060249. The next prime is 321512060263. The reversal of 321512060257 is 752060215123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320311853521 + 1200206736 = 565961^2 + 34644^2 .

It is a cyclic number.

It is not a de Polignac number, because 321512060257 - 2³ = 321512060249 is a prime.

It is not a weakly prime, because it can be changed into another prime (321512060297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160756030128 + 160756030129.

It is an arithmetic number, because the mean of its divisors is an integer number (160756030129).

Almost surely, 2^321512060257 is an apocalyptic number.

It is an amenable number.

321512060257 is a deficient number, since it is larger than the sum of its proper divisors (1).

321512060257 is an equidigital number, since it uses as much as digits as its factorization.

321512060257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 321512060257 in words is "three hundred twenty-one billion, five hundred twelve million, sixty thousand, two hundred fifty-seven".