243918925 has 6 divisors (see below), whose sum is σ = 302459498. Its totient is φ = 195135120.

The previous prime is 243918923. The next prime is 243918937. The reversal of 243918925 is 529819342.

243918925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 51652969 + 192265956 = 7187^2 + 13866^2 .

It is not a de Polignac number, because 243918925 - 2¹ = 243918923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243918923) 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, 4878354 + ... + 4878403.

Almost surely, 2^243918925 is an apocalyptic number.

243918925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243918925 is a deficient number, since it is larger than the sum of its proper divisors (58540573).

243918925 is an equidigital number, since it uses as much as digits as its factorization.

243918925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9756767 (or 9756762 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 243918925 is about 15617.9039886920. The cubic root of 243918925 is about 624.8107587062.

The spelling of 243918925 in words is "two hundred forty-three million, nine hundred eighteen thousand, nine hundred twenty-five".