243151169 has 2 divisors, whose sum is σ = 243151170. Its totient is φ = 243151168.

The previous prime is 243151133. The next prime is 243151199. The reversal of 243151169 is 961151342.

243151169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199854769 + 43296400 = 14137^2 + 6580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243151169 is a prime.

It is a super-2 number, since 2×243151169² = 118244981972133122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243151199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121575584 + 121575585.

It is an arithmetic number, because the mean of its divisors is an integer number (121575585).

Almost surely, 2^243151169 is an apocalyptic number.

It is an amenable number.

243151169 is a deficient number, since it is larger than the sum of its proper divisors (1).

243151169 is an equidigital number, since it uses as much as digits as its factorization.

243151169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 243151169 is about 15593.3052621951. The cubic root of 243151169 is about 624.1545209935.

The spelling of 243151169 in words is "two hundred forty-three million, one hundred fifty-one thousand, one hundred sixty-nine".