243052225 has 12 divisors (see below), whose sum is σ = 324568636. Its totient is φ = 179484480.

The previous prime is 243052217. The next prime is 243052273. The reversal of 243052225 is 522250342.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 68178049 + 174874176 = 8257^2 + 13224^2 .

It is not a de Polignac number, because 243052225 - 2³ = 243052217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243052225.

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, 373602 + ... + 374251.

Almost surely, 2^243052225 is an apocalyptic number.

243052225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243052225 is a deficient number, since it is larger than the sum of its proper divisors (81516411).

243052225 is a wasteful number, since it uses less digits than its factorization.

243052225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747876 (or 747871 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 243052225 is about 15590.1322957825. The cubic root of 243052225 is about 624.0698483955.

The spelling of 243052225 in words is "two hundred forty-three million, fifty-two thousand, two hundred twenty-five".