243121245225 has 24 divisors (see below), whose sum is σ = 401981712000. Its totient is φ = 129657808320.

The previous prime is 243121245181. The next prime is 243121245233. The reversal of 243121245225 is 522542121342.

243121245225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243121245225 - 2⁷ = 243121245097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1548651 + ... + 1698399.

It is an arithmetic number, because the mean of its divisors is an integer number (16749238000).

Almost surely, 2^243121245225 is an apocalyptic number.

243121245225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243121245225 is a deficient number, since it is larger than the sum of its proper divisors (158860466775).

243121245225 is a wasteful number, since it uses less digits than its factorization.

243121245225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171409 (or 171404 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

Adding to 243121245225 its reverse (522542121342), we get a palindrome (765663366567).

The spelling of 243121245225 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred twenty-five".