243222041 has 4 divisors (see below), whose sum is σ = 243261732. Its totient is φ = 243182352.

The previous prime is 243221989. The next prime is 243222103. The reversal of 243222041 is 140222342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130416400 + 112805641 = 11420^2 + 10621^2 .

It is a cyclic number.

It is not a de Polignac number, because 243222041 - 2⁶ = 243221977 is a prime.

It is a super-2 number, since 2×243222041² = 118313922456411362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243222341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8486 + ... + 23631.

It is an arithmetic number, because the mean of its divisors is an integer number (60815433).

Almost surely, 2^243222041 is an apocalyptic number.

It is an amenable number.

243222041 is a deficient number, since it is larger than the sum of its proper divisors (39691).

243222041 is an equidigital number, since it uses as much as digits as its factorization.

243222041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39690.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243222041 is about 15595.5776103356. The cubic root of 243222041 is about 624.2151564990.

Adding to 243222041 its reverse (140222342), we get a palindrome (383444383).

The spelling of 243222041 in words is "two hundred forty-three million, two hundred twenty-two thousand, forty-one".