243990325 has 12 divisors (see below), whose sum is σ = 315703008. Its totient is φ = 186705200.

The previous prime is 243990319. The next prime is 243990337. The reversal of 243990325 is 523099342.

It is not a de Polignac number, because 243990325 - 2³ = 243990317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211591 + ... + 212740.

It is an arithmetic number, because the mean of its divisors is an integer number (26308584).

Almost surely, 2^243990325 is an apocalyptic number.

243990325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243990325 is a deficient number, since it is larger than the sum of its proper divisors (71712683).

243990325 is a wasteful number, since it uses less digits than its factorization.

243990325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424364 (or 424359 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 243990325 is about 15620.1896595400. The cubic root of 243990325 is about 624.8717176716.

The spelling of 243990325 in words is "two hundred forty-three million, nine hundred ninety thousand, three hundred twenty-five".