243242225 has 12 divisors (see below), whose sum is σ = 304551936. Its totient is φ = 192702480.

The previous prime is 243242203. The next prime is 243242231. The reversal of 243242225 is 522242342.

It is a happy number.

It is not a de Polignac number, because 243242225 - 2⁸ = 243241969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243242194 and 243242203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44657 + ... + 49806.

It is an arithmetic number, because the mean of its divisors is an integer number (25379328).

Almost surely, 2^243242225 is an apocalyptic number.

243242225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243242225 is a deficient number, since it is larger than the sum of its proper divisors (61309711).

243242225 is a wasteful number, since it uses less digits than its factorization.

243242225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94576 (or 94571 counting only the distinct ones).

The product of its digits is 7680, while the sum is 26.

The square root of 243242225 is about 15596.2247034338. The cubic root of 243242225 is about 624.2324230402.

Adding to 243242225 its reverse (522242342), we get a palindrome (765484567).

The spelling of 243242225 in words is "two hundred forty-three million, two hundred forty-two thousand, two hundred twenty-five".