231957824437 has 2 divisors, whose sum is σ = 231957824438. Its totient is φ = 231957824436.

The previous prime is 231957824383. The next prime is 231957824443. The reversal of 231957824437 is 734428759132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119500884721 + 112456939716 = 345689^2 + 335346^2 .

It is a cyclic number.

It is not a de Polignac number, because 231957824437 - 2²⁷ = 231823606709 is a prime.

It is a super-2 number, since 2×231957824437² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231957828437) 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, 115978912218 + 115978912219.

It is an arithmetic number, because the mean of its divisors is an integer number (115978912219).

Almost surely, 2^231957824437 is an apocalyptic number.

It is an amenable number.

231957824437 is a deficient number, since it is larger than the sum of its proper divisors (1).

231957824437 is an equidigital number, since it uses as much as digits as its factorization.

231957824437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 55.

The spelling of 231957824437 in words is "two hundred thirty-one billion, nine hundred fifty-seven million, eight hundred twenty-four thousand, four hundred thirty-seven".