243135122025 has 24 divisors (see below), whose sum is σ = 415844902080. Its totient is φ = 125200613440.

The previous prime is 243135122023. The next prime is 243135122057. The reversal of 243135122025 is 520221531342.

It is not a de Polignac number, because 243135122025 - 2¹ = 243135122023 is a prime.

It is a super-2 number, since 2×243135122025² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243135121983 and 243135122001.

It is not an unprimeable number, because it can be changed into a prime (243135122023) 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, 55890957 + ... + 55895306.

It is an arithmetic number, because the mean of its divisors is an integer number (17326870920).

Almost surely, 2^243135122025 is an apocalyptic number.

243135122025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243135122025 is a deficient number, since it is larger than the sum of its proper divisors (172709780055).

243135122025 is a wasteful number, since it uses less digits than its factorization.

243135122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111786305 (or 111786300 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 243135122025 its reverse (520221531342), we get a palindrome (763356653367).

The spelling of 243135122025 in words is "two hundred forty-three billion, one hundred thirty-five million, one hundred twenty-two thousand, twenty-five".