231433091936213 has 2 divisors, whose sum is σ = 231433091936214. Its totient is φ = 231433091936212.

The previous prime is 231433091936183. The next prime is 231433091936317. The reversal of 231433091936213 is 312639190334132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137348485058929 + 94084606877284 = 11719577^2 + 9699722^2 .

It is a cyclic number.

It is not a de Polignac number, because 231433091936213 - 2¹² = 231433091932117 is a prime.

It is a super-2 number, since 2×231433091936213² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231433091936413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115716545968106 + 115716545968107.

It is an arithmetic number, because the mean of its divisors is an integer number (115716545968107).

Almost surely, 2^{231433091936213} is an apocalyptic number.

It is an amenable number.

231433091936213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231433091936213 is an equidigital number, since it uses as much as digits as its factorization.

231433091936213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 50.

The spelling of 231433091936213 in words is "two hundred thirty-one trillion, four hundred thirty-three billion, ninety-one million, nine hundred thirty-six thousand, two hundred thirteen".