231638041 has 2 divisors, whose sum is σ = 231638042. Its totient is φ = 231638040.

The previous prime is 231638027. The next prime is 231638053. The reversal of 231638041 is 140836132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213276816 + 18361225 = 14604^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 231638041 - 2⁵ = 231638009 is a prime.

It is not a weakly prime, because it can be changed into another prime (231638441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115819020 + 115819021.

It is an arithmetic number, because the mean of its divisors is an integer number (115819021).

Almost surely, 2^231638041 is an apocalyptic number.

It is an amenable number.

231638041 is a deficient number, since it is larger than the sum of its proper divisors (1).

231638041 is an equidigital number, since it uses as much as digits as its factorization.

231638041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 231638041 is about 15219.6596873912. The cubic root of 231638041 is about 614.1436434253.

The spelling of 231638041 in words is "two hundred thirty-one million, six hundred thirty-eight thousand, forty-one".