243204025 has 9 divisors (see below), whose sum is σ = 301669711. Its totient is φ = 194500840.

The previous prime is 243203999. The next prime is 243204043. The reversal of 243204025 is 520402342.

The square root of 243204025 is 15595.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 155650576 = 9357^2 + 12476^2 .

It is not a de Polignac number, because 243204025 - 2¹³ = 243195833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243203987 and 243204005.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76416 + ... + 79534.

Almost surely, 2^243204025 is an apocalyptic number.

243204025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243204025 is the 15595-th square number.

243204025 is the 7798-th centered octagonal number.

It is an amenable number.

243204025 is a deficient number, since it is larger than the sum of its proper divisors (58465686).

243204025 is an frugal number, since it uses more digits than its factorization.

243204025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6248 (or 3124 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The cubic root of 243204025 is about 624.1997437813.

Adding to 243204025 its reverse (520402342), we get a palindrome (763606367).

The spelling of 243204025 in words is "two hundred forty-three million, two hundred four thousand, twenty-five".