243504801 has 24 divisors (see below), whose sum is σ = 359073000. Its totient is φ = 158982912.

The previous prime is 243504797. The next prime is 243504809. The reversal of 243504801 is 108405342.

It can be written as a sum of positive squares in 4 ways, for example, as 35712576 + 207792225 = 5976^2 + 14415^2 .

It is not a de Polignac number, because 243504801 - 2² = 243504797 is a prime.

It is a super-2 number, since 2×243504801² = 118589176220099202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243504809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85915 + ... + 88703.

It is an arithmetic number, because the mean of its divisors is an integer number (14961375).

Almost surely, 2^243504801 is an apocalyptic number.

It is an amenable number.

243504801 is a deficient number, since it is larger than the sum of its proper divisors (115568199).

243504801 is a wasteful number, since it uses less digits than its factorization.

243504801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 243504801 is about 15604.6403675317. The cubic root of 243504801 is about 624.4569584928.

The spelling of 243504801 in words is "two hundred forty-three million, five hundred four thousand, eight hundred one".