243045521025 has 24 divisors (see below), whose sum is σ = 402101388864. Its totient is φ = 129538430400.

The previous prime is 243045521003. The next prime is 243045521083. The reversal of 243045521025 is 520125540342.

It is a happy number.

It is not a de Polignac number, because 243045521025 - 2⁶ = 243045520961 is a prime.

It is a super-2 number, since 2×243045521025² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 959014 + ... + 1185663.

It is an arithmetic number, because the mean of its divisors is an integer number (16754224536).

Almost surely, 2^243045521025 is an apocalyptic number.

243045521025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243045521025 is a deficient number, since it is larger than the sum of its proper divisors (159055867839).

243045521025 is a wasteful number, since it uses less digits than its factorization.

243045521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146201 (or 2146196 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 243045521025 in words is "two hundred forty-three billion, forty-five million, five hundred twenty-one thousand, twenty-five".