243225049 has 2 divisors, whose sum is σ = 243225050. Its totient is φ = 243225048.

The previous prime is 243225043. The next prime is 243225053. The reversal of 243225049 is 940522342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225961024 + 17264025 = 15032^2 + 4155^2 .

It is a cyclic number.

It is not a de Polignac number, because 243225049 - 2¹⁵ = 243192281 is a prime.

It is a super-2 number, since 2×243225049² = 118316848922104802, which contains 22 as substring.

It is equal to p_13328563 and since 243225049 and 13328563 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243225049.

It is not a weakly prime, because it can be changed into another prime (243225043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121612524 + 121612525.

It is an arithmetic number, because the mean of its divisors is an integer number (121612525).

Almost surely, 2^243225049 is an apocalyptic number.

It is an amenable number.

243225049 is a deficient number, since it is larger than the sum of its proper divisors (1).

243225049 is an equidigital number, since it uses as much as digits as its factorization.

243225049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 243225049 is about 15595.6740476326. The cubic root of 243225049 is about 624.2177297738.

The spelling of 243225049 in words is "two hundred forty-three million, two hundred twenty-five thousand, forty-nine".