231646241 has 2 divisors, whose sum is σ = 231646242. Its totient is φ = 231646240.

The previous prime is 231646237. The next prime is 231646253. The reversal of 231646241 is 142646132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 102596641 = 11360^2 + 10129^2 .

It is a cyclic number.

It is not a de Polignac number, because 231646241 - 2² = 231646237 is a prime.

It is a Chen prime.

It is equal to p_12728234 and since 231646241 and 12728234 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231646211) 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, 115823120 + 115823121.

It is an arithmetic number, because the mean of its divisors is an integer number (115823121).

Almost surely, 2^231646241 is an apocalyptic number.

It is an amenable number.

231646241 is a deficient number, since it is larger than the sum of its proper divisors (1).

231646241 is an equidigital number, since it uses as much as digits as its factorization.

231646241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 231646241 is about 15219.9290734221. The cubic root of 231646241 is about 614.1508902465.

The spelling of 231646241 in words is "two hundred thirty-one million, six hundred forty-six thousand, two hundred forty-one".