243427217 has 8 divisors (see below), whose sum is σ = 267496992. Its totient is φ = 219680800.

The previous prime is 243427211. The next prime is 243427279. The reversal of 243427217 is 712724342.

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 243427217 - 2⁴ = 243427201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243427211) 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, 79259 + ... + 82272.

It is an arithmetic number, because the mean of its divisors is an integer number (33437124).

Almost surely, 2^243427217 is an apocalyptic number.

It is an amenable number.

243427217 is a deficient number, since it is larger than the sum of its proper divisors (24069775).

243427217 is a wasteful number, since it uses less digits than its factorization.

243427217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161679.

The product of its digits is 18816, while the sum is 32.

The square root of 243427217 is about 15602.1542422833. The cubic root of 243427217 is about 624.3906312380.

The spelling of 243427217 in words is "two hundred forty-three million, four hundred twenty-seven thousand, two hundred seventeen".