231313321193 has 2 divisors, whose sum is σ = 231313321194. Its totient is φ = 231313321192.

The previous prime is 231313321181. The next prime is 231313321241. The reversal of 231313321193 is 391123313132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230142791824 + 1170529369 = 479732^2 + 34213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231313321193 is a prime.

It is a super-2 number, since 2×231313321193² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231313321493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656660596 + 115656660597.

It is an arithmetic number, because the mean of its divisors is an integer number (115656660597).

Almost surely, 2^231313321193 is an apocalyptic number.

It is an amenable number.

231313321193 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313321193 is an equidigital number, since it uses as much as digits as its factorization.

231313321193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The spelling of 231313321193 in words is "two hundred thirty-one billion, three hundred thirteen million, three hundred twenty-one thousand, one hundred ninety-three".