321215257722313 has 2 divisors, whose sum is σ = 321215257722314. Its totient is φ = 321215257722312.

The previous prime is 321215257722287. The next prime is 321215257722343. The reversal of 321215257722313 is 313227752512123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205017809944249 + 116197447778064 = 14318443^2 + 10779492^2 .

It is a cyclic number.

It is not a de Polignac number, because 321215257722313 - 2³⁷ = 321077818768841 is a prime.

It is a super-2 number, since 2×321215257722313² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321215257722343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160607628861156 + 160607628861157.

It is an arithmetic number, because the mean of its divisors is an integer number (160607628861157).

Almost surely, 2^{321215257722313} is an apocalyptic number.

It is an amenable number.

321215257722313 is a deficient number, since it is larger than the sum of its proper divisors (1).

321215257722313 is an equidigital number, since it uses as much as digits as its factorization.

321215257722313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 46.

The spelling of 321215257722313 in words is "three hundred twenty-one trillion, two hundred fifteen billion, two hundred fifty-seven million, seven hundred twenty-two thousand, three hundred thirteen".