231445169 has 2 divisors, whose sum is σ = 231445170. Its totient is φ = 231445168.

The previous prime is 231445153. The next prime is 231445217. The reversal of 231445169 is 961544132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185368225 + 46076944 = 13615^2 + 6788^2 .

It is a cyclic number.

It is not a de Polignac number, because 231445169 - 2⁴ = 231445153 is a prime.

It is a super-2 number, since 2×231445169² = 107133732506877122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231445129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115722584 + 115722585.

It is an arithmetic number, because the mean of its divisors is an integer number (115722585).

Almost surely, 2^231445169 is an apocalyptic number.

It is an amenable number.

231445169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231445169 is an equidigital number, since it uses as much as digits as its factorization.

231445169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 231445169 is about 15213.3220895372. The cubic root of 231445169 is about 613.9731417763.

The spelling of 231445169 in words is "two hundred thirty-one million, four hundred forty-five thousand, one hundred sixty-nine".