231310331868157 has 2 divisors, whose sum is σ = 231310331868158. Its totient is φ = 231310331868156.

The previous prime is 231310331868047. The next prime is 231310331868173. The reversal of 231310331868157 is 751868133013132.

231310331868157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138720789324441 + 92589542543716 = 11777979^2 + 9622346^2 .

It is a cyclic number.

It is not a de Polignac number, because 231310331868157 - 2¹⁵ = 231310331835389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231310331868857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655165934078 + 115655165934079.

It is an arithmetic number, because the mean of its divisors is an integer number (115655165934079).

Almost surely, 2^{231310331868157} is an apocalyptic number.

It is an amenable number.

231310331868157 is a deficient number, since it is larger than the sum of its proper divisors (1).

231310331868157 is an equidigital number, since it uses as much as digits as its factorization.

231310331868157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 231310331868157 in words is "two hundred thirty-one trillion, three hundred ten billion, three hundred thirty-one million, eight hundred sixty-eight thousand, one hundred fifty-seven".