243580825 has 12 divisors (see below), whose sum is σ = 302419260. Its totient is φ = 194620160.

The previous prime is 243580819. The next prime is 243580829. The reversal of 243580825 is 528085342.

It can be written as a sum of positive squares in 6 ways, for example, as 5588496 + 237992329 = 2364^2 + 15427^2 .

It is not a de Polignac number, because 243580825 - 2⁷ = 243580697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243580829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15741 + ... + 27109.

It is an arithmetic number, because the mean of its divisors is an integer number (25201605).

Almost surely, 2^243580825 is an apocalyptic number.

243580825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243580825 is a deficient number, since it is larger than the sum of its proper divisors (58838435).

243580825 is a wasteful number, since it uses less digits than its factorization.

243580825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12236 (or 12231 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 243580825 is about 15607.0761195043. The cubic root of 243580825 is about 624.5219384246.

The spelling of 243580825 in words is "two hundred forty-three million, five hundred eighty thousand, eight hundred twenty-five".