231169 has 2 divisors, whose sum is σ = 231170. Its totient is φ = 231168.

The previous prime is 231131. The next prime is 231197. The reversal of 231169 is 961132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 82944 = 385^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 231169 - 2⁷ = 231041 is a prime.

It is a super-2 number, since 2×231169² = 106878213122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115584 + 115585.

It is an arithmetic number, because the mean of its divisors is an integer number (115585).

2²³¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

231169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231169 is an equidigital number, since it uses as much as digits as its factorization.

231169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 231169 is about 480.8003743759. The cubic root of 231169 is about 61.3728839370.

It can be divided in two parts, 231 and 169, that added together give a square (400 = 20²).

The spelling of 231169 in words is "two hundred thirty-one thousand, one hundred sixty-nine".