243622249 has 8 divisors (see below), whose sum is σ = 262514952. Its totient is φ = 224751360.

The previous prime is 243622231. The next prime is 243622277. The reversal of 243622249 is 942226342.

It can be written as a sum of positive squares in 4 ways, for example, as 99141849 + 144480400 = 9957^2 + 12020^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243622249 - 2⁹ = 243621737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243622849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23457 + ... + 32209.

It is an arithmetic number, because the mean of its divisors is an integer number (32814369).

Almost surely, 2^243622249 is an apocalyptic number.

It is an amenable number.

243622249 is a deficient number, since it is larger than the sum of its proper divisors (18892703).

243622249 is a wasteful number, since it uses less digits than its factorization.

243622249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10907.

The product of its digits is 41472, while the sum is 34.

The square root of 243622249 is about 15608.4031534299. The cubic root of 243622249 is about 624.5573390361.

The spelling of 243622249 in words is "two hundred forty-three million, six hundred twenty-two thousand, two hundred forty-nine".