243201255525 has 72 divisors (see below), whose sum is σ = 437846797440. Its totient is φ = 129039563520.

The previous prime is 243201255509. The next prime is 243201255527. The reversal of 243201255525 is 525552102342.

243201255525 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 0 + 125 + 5 + 525 = 666.

It is not a de Polignac number, because 243201255525 - 2⁴ = 243201255509 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243201255525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201255527) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 89641569 + ... + 89644281.

It is an arithmetic number, because the mean of its divisors is an integer number (6081205520).

Almost surely, 2^243201255525 is an apocalyptic number.

243201255525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243201255525 is a deficient number, since it is larger than the sum of its proper divisors (194645541915).

243201255525 is a wasteful number, since it uses less digits than its factorization.

243201255525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635 (or 4627 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 243201255525 its reverse (525552102342), we get a palindrome (768753357867).

The spelling of 243201255525 in words is "two hundred forty-three billion, two hundred one million, two hundred fifty-five thousand, five hundred twenty-five".