231650161 has 2 divisors, whose sum is σ = 231650162. Its totient is φ = 231650160.

The previous prime is 231650131. The next prime is 231650171. The reversal of 231650161 is 161056132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133541136 + 98109025 = 11556^2 + 9905^2 .

It is a cyclic number.

It is not a de Polignac number, because 231650161 - 2¹¹ = 231648113 is a prime.

It is not a weakly prime, because it can be changed into another prime (231650131) 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, 115825080 + 115825081.

It is an arithmetic number, because the mean of its divisors is an integer number (115825081).

Almost surely, 2^231650161 is an apocalyptic number.

It is an amenable number.

231650161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231650161 is an equidigital number, since it uses as much as digits as its factorization.

231650161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 231650161 is about 15220.0578514012. The cubic root of 231650161 is about 614.1543545202.

The spelling of 231650161 in words is "two hundred thirty-one million, six hundred fifty thousand, one hundred sixty-one".