231275403187237 has 2 divisors, whose sum is σ = 231275403187238. Its totient is φ = 231275403187236.

The previous prime is 231275403187193. The next prime is 231275403187271. The reversal of 231275403187237 is 732781304572132.

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., 230364216484516 + 911186702721 = 15177754^2 + 954561^2 .

It is a cyclic number.

It is not a de Polignac number, because 231275403187237 - 2⁴³ = 222479310165029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231275403187337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115637701593618 + 115637701593619.

It is an arithmetic number, because the mean of its divisors is an integer number (115637701593619).

Almost surely, 2^{231275403187237} is an apocalyptic number.

It is an amenable number.

231275403187237 is a deficient number, since it is larger than the sum of its proper divisors (1).

231275403187237 is an equidigital number, since it uses as much as digits as its factorization.

231275403187237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 231275403187237 in words is "two hundred thirty-one trillion, two hundred seventy-five billion, four hundred three million, one hundred eighty-seven thousand, two hundred thirty-seven".