243245225 has 12 divisors (see below), whose sum is σ = 301819596. Its totient is φ = 194470080.

The previous prime is 243245221. The next prime is 243245237. The reversal of 243245225 is 522542342.

It can be written as a sum of positive squares in 6 ways, for example, as 70375321 + 172869904 = 8389^2 + 13148^2 .

It is not a de Polignac number, because 243245225 - 2² = 243245221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243245221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65519 + ... + 69131.

It is an arithmetic number, because the mean of its divisors is an integer number (25151633).

Almost surely, 2^243245225 is an apocalyptic number.

243245225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243245225 is a deficient number, since it is larger than the sum of its proper divisors (58574371).

243245225 is a wasteful number, since it uses less digits than its factorization.

243245225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316 (or 6311 counting only the distinct ones).

The product of its digits is 19200, while the sum is 29.

The square root of 243245225 is about 15596.3208802589. The cubic root of 243245225 is about 624.2349893293.

Adding to 243245225 its reverse (522542342), we get a palindrome (765787567).

The spelling of 243245225 in words is "two hundred forty-three million, two hundred forty-five thousand, two hundred twenty-five".