243042225 has 24 divisors (see below), whose sum is σ = 402926592. Its totient is φ = 129268800.

The previous prime is 243042203. The next prime is 243042227. The reversal of 243042225 is 522240342.

It is a happy number.

It is not a de Polignac number, because 243042225 - 2⁶ = 243042161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243042195 and 243042204.

It is not an unprimeable number, because it can be changed into a prime (243042227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24495 + ... + 32955.

It is an arithmetic number, because the mean of its divisors is an integer number (16788608).

Almost surely, 2^243042225 is an apocalyptic number.

243042225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243042225 is a deficient number, since it is larger than the sum of its proper divisors (159884367).

243042225 is a wasteful number, since it uses less digits than its factorization.

243042225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8857 (or 8852 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 243042225 is about 15589.8115767959. The cubic root of 243042225 is about 624.0612894886.

Adding to 243042225 its reverse (522240342), we get a palindrome (765282567).

The spelling of 243042225 in words is "two hundred forty-three million, forty-two thousand, two hundred twenty-five".