243513825 has 24 divisors (see below), whose sum is σ = 404128896. Its totient is φ = 129384000.

The previous prime is 243513817. The next prime is 243513833. The reversal of 243513825 is 528315342.

It is an interprime number because it is at equal distance from previous prime (243513817) and next prime (243513833).

It is not a de Polignac number, because 243513825 - 2³ = 243513817 is a prime.

It is a super-2 number, since 2×243513825² = 118597965932261250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14335 + ... + 26315.

It is an arithmetic number, because the mean of its divisors is an integer number (16838704).

Almost surely, 2^243513825 is an apocalyptic number.

243513825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243513825 is a deficient number, since it is larger than the sum of its proper divisors (160615071).

243513825 is a wasteful number, since it uses less digits than its factorization.

243513825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265 (or 12260 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 243513825 is about 15604.9295096133. The cubic root of 243513825 is about 624.4646722763.

The spelling of 243513825 in words is "two hundred forty-three million, five hundred thirteen thousand, eight hundred twenty-five".