231242240171 has 2 divisors, whose sum is σ = 231242240172. Its totient is φ = 231242240170.

The previous prime is 231242240153. The next prime is 231242240183. The reversal of 231242240171 is 171042242132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231242240171 - 2¹⁸ = 231241978027 is a prime.

It is a super-2 number, since 2×231242240171² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (231242240071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115621120085 + 115621120086.

It is an arithmetic number, because the mean of its divisors is an integer number (115621120086).

Almost surely, 2^231242240171 is an apocalyptic number.

231242240171 is a deficient number, since it is larger than the sum of its proper divisors (1).

231242240171 is an equidigital number, since it uses as much as digits as its factorization.

231242240171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The spelling of 231242240171 in words is "two hundred thirty-one billion, two hundred forty-two million, two hundred forty thousand, one hundred seventy-one".