243926825 has 6 divisors (see below), whose sum is σ = 302469294. Its totient is φ = 195141440.

The previous prime is 243926821. The next prime is 243926843. The reversal of 243926825 is 528629342.

It can be written as a sum of positive squares in 3 ways, for example, as 36192256 + 207734569 = 6016^2 + 14413^2 .

It is not a de Polignac number, because 243926825 - 2² = 243926821 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (243926821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4878512 + ... + 4878561.

It is an arithmetic number, because the mean of its divisors is an integer number (50411549).

Almost surely, 2^243926825 is an apocalyptic number.

243926825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243926825 is a deficient number, since it is larger than the sum of its proper divisors (58542469).

243926825 is an equidigital number, since it uses as much as digits as its factorization.

243926825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757083 (or 9757078 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 243926825 is about 15618.1569015041. The cubic root of 243926825 is about 624.8175040509.

The spelling of 243926825 in words is "two hundred forty-three million, nine hundred twenty-six thousand, eight hundred twenty-five".