243012168 has 72 divisors (see below), whose sum is σ = 765623430. Its totient is φ = 69431040.

The previous prime is 243012163. The next prime is 243012173. The reversal of 243012168 is 861210342.

It is an interprime number because it is at equal distance from previous prime (243012163) and next prime (243012173).

It can be written as a sum of positive squares in only one way, i.e., 242798724 + 213444 = 15582^2 + 462^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (243012163) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30913 + ... + 37968.

Almost surely, 2^243012168 is an apocalyptic number.

243012168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243012168 is an abundant number, since it is smaller than the sum of its proper divisors (522611262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243012168 is a wasteful number, since it uses less digits than its factorization.

243012168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68907 (or 68893 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 243012168 is about 15588.8475520162. The cubic root of 243012168 is about 624.0355625689.

The spelling of 243012168 in words is "two hundred forty-three million, twelve thousand, one hundred sixty-eight".