243504164 has 6 divisors (see below), whose sum is σ = 426132294. Its totient is φ = 121752080.

The previous prime is 243504143. The next prime is 243504169. The reversal of 243504164 is 461405342.

It can be written as a sum of positive squares in only one way, i.e., 218803264 + 24700900 = 14792^2 + 4970^2 .

It is not an unprimeable number, because it can be changed into a prime (243504169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30438017 + ... + 30438024.

It is an arithmetic number, because the mean of its divisors is an integer number (71022049).

Almost surely, 2^243504164 is an apocalyptic number.

It is an amenable number.

243504164 is a deficient number, since it is larger than the sum of its proper divisors (182628130).

243504164 is a wasteful number, since it uses less digits than its factorization.

243504164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60876045 (or 60876043 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 243504164 is about 15604.6199569230. The cubic root of 243504164 is about 624.4564139732.

The spelling of 243504164 in words is "two hundred forty-three million, five hundred four thousand, one hundred sixty-four".