243825645 has 64 divisors (see below), whose sum is σ = 492687360. Its totient is φ = 100328448.

The previous prime is 243825641. The next prime is 243825661. The reversal of 243825645 is 546528342.

It is not a de Polignac number, because 243825645 - 2² = 243825641 is a prime.

It is a super-3 number, since 3×243825645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243825641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38086 + ... + 44024.

It is an arithmetic number, because the mean of its divisors is an integer number (7698240).

Almost surely, 2^243825645 is an apocalyptic number.

It is an amenable number.

243825645 is an abundant number, since it is smaller than the sum of its proper divisors (248861715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243825645 is a wasteful number, since it uses less digits than its factorization.

243825645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994.

The product of its digits is 230400, while the sum is 39.

The square root of 243825645 is about 15614.9173869092. The cubic root of 243825645 is about 624.7311013929.

The spelling of 243825645 in words is "two hundred forty-three million, eight hundred twenty-five thousand, six hundred forty-five".