231551431354513 has 2 divisors, whose sum is σ = 231551431354514. Its totient is φ = 231551431354512.

The previous prime is 231551431354409. The next prime is 231551431354597. The reversal of 231551431354513 is 315453134155132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166395990894849 + 65155440459664 = 12899457^2 + 8071892^2 .

It is a cyclic number.

It is not a de Polignac number, because 231551431354513 - 2³⁷ = 231413992401041 is a prime.

It is not a weakly prime, because it can be changed into another prime (231551431354613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775715677256 + 115775715677257.

It is an arithmetic number, because the mean of its divisors is an integer number (115775715677257).

Almost surely, 2^{231551431354513} is an apocalyptic number.

It is an amenable number.

231551431354513 is a deficient number, since it is larger than the sum of its proper divisors (1).

231551431354513 is an equidigital number, since it uses as much as digits as its factorization.

231551431354513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 46.

The spelling of 231551431354513 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred fifty-four thousand, five hundred thirteen".