243022399 has 2 divisors, whose sum is σ = 243022400. Its totient is φ = 243022398.

The previous prime is 243022363. The next prime is 243022453. The reversal of 243022399 is 993220342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243022399 - 2¹³ = 243014207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243022499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121511199 + 121511200.

It is an arithmetic number, because the mean of its divisors is an integer number (121511200).

Almost surely, 2^243022399 is an apocalyptic number.

243022399 is a deficient number, since it is larger than the sum of its proper divisors (1).

243022399 is an equidigital number, since it uses as much as digits as its factorization.

243022399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 243022399 is about 15589.1756998245. The cubic root of 243022399 is about 624.0443199057.

The spelling of 243022399 in words is "two hundred forty-three million, twenty-two thousand, three hundred ninety-nine".