243010825 has 6 divisors (see below), whose sum is σ = 301333454. Its totient is φ = 194408640.

The previous prime is 243010787. The next prime is 243010841. The reversal of 243010825 is 528010342.

It can be written as a sum of positive squares in 3 ways, for example, as 149769 + 242861056 = 387^2 + 15584^2 .

It is not a de Polignac number, because 243010825 - 2¹⁹ = 242486537 is a prime.

It is a super-2 number, since 2×243010825² = 118108522134361250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 9720433 = 243010825 / (2 + 4 + 3 + 0 + 1 + 0 + 8 + 2 + 5).

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 243010825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4860192 + ... + 4860241.

Almost surely, 2^243010825 is an apocalyptic number.

243010825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243010825 is a deficient number, since it is larger than the sum of its proper divisors (58322629).

243010825 is an equidigital number, since it uses as much as digits as its factorization.

243010825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720443 (or 9720438 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 243010825 is about 15588.8044762900. The cubic root of 243010825 is about 624.0344129950.

The spelling of 243010825 in words is "two hundred forty-three million, ten thousand, eight hundred twenty-five".