321430275315257 has 2 divisors, whose sum is σ = 321430275315258. Its totient is φ = 321430275315256.

The previous prime is 321430275315169. The next prime is 321430275315271. The reversal of 321430275315257 is 752513572034123.

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., 177211047940096 + 144219227375161 = 13312064^2 + 12009131^2 .

It is a cyclic number.

It is not a de Polignac number, because 321430275315257 - 2¹² = 321430275311161 is a prime.

It is not a weakly prime, because it can be changed into another prime (321430275315157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160715137657628 + 160715137657629.

It is an arithmetic number, because the mean of its divisors is an integer number (160715137657629).

Almost surely, 2^{321430275315257} is an apocalyptic number.

It is an amenable number.

321430275315257 is a deficient number, since it is larger than the sum of its proper divisors (1).

321430275315257 is an equidigital number, since it uses as much as digits as its factorization.

321430275315257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292000, while the sum is 50.

The spelling of 321430275315257 in words is "three hundred twenty-one trillion, four hundred thirty billion, two hundred seventy-five million, three hundred fifteen thousand, two hundred fifty-seven".