243561025 has 12 divisors (see below), whose sum is σ = 302522800. Its totient is φ = 194521680.

The previous prime is 243561001. The next prime is 243561067. The reversal of 243561025 is 520165342.

It is not a de Polignac number, because 243561025 - 2⁷ = 243560897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243560984 and 243561002.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 7606 + ... + 23344.

Almost surely, 2^243561025 is an apocalyptic number.

243561025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243561025 is a deficient number, since it is larger than the sum of its proper divisors (58961775).

243561025 is a wasteful number, since it uses less digits than its factorization.

243561025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368 (or 16363 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 243561025 is about 15606.4417789578. The cubic root of 243561025 is about 624.5050160890.

The spelling of 243561025 in words is "two hundred forty-three million, five hundred sixty-one thousand, twenty-five".