231551431354613 has 2 divisors, whose sum is σ = 231551431354614. Its totient is φ = 231551431354612.

The previous prime is 231551431354597. The next prime is 231551431354697. The reversal of 231551431354613 is 316453134155132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193244529142564 + 38306902212049 = 13901242^2 + 6189257^2 .

It is a cyclic number.

It is not a de Polignac number, because 231551431354613 - 2⁴ = 231551431354597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231551431354513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775715677306 + 115775715677307.

It is an arithmetic number, because the mean of its divisors is an integer number (115775715677307).

Almost surely, 2^{231551431354613} is an apocalyptic number.

It is an amenable number.

231551431354613 is a deficient number, since it is larger than the sum of its proper divisors (1).

231551431354613 is an equidigital number, since it uses as much as digits as its factorization.

231551431354613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 47.

The spelling of 231551431354613 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred fifty-four thousand, six hundred thirteen".