321430275315157 has 2 divisors, whose sum is σ = 321430275315158. Its totient is φ = 321430275315156.

The previous prime is 321430275315041. The next prime is 321430275315169. The reversal of 321430275315157 is 751513572034123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316599603216516 + 4830672098641 = 17793246^2 + 2197879^2 .

It is a cyclic number.

It is not a de Polignac number, because 321430275315157 - 2¹¹ = 321430275313109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321430275315157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321430275315257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160715137657578 + 160715137657579.

It is an arithmetic number, because the mean of its divisors is an integer number (160715137657579).

Almost surely, 2^{321430275315157} is an apocalyptic number.

It is an amenable number.

321430275315157 is a deficient number, since it is larger than the sum of its proper divisors (1).

321430275315157 is an equidigital number, since it uses as much as digits as its factorization.

321430275315157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 321430275315157 in words is "three hundred twenty-one trillion, four hundred thirty billion, two hundred seventy-five million, three hundred fifteen thousand, one hundred fifty-seven".