243414221 has 8 divisors (see below), whose sum is σ = 254349504. Its totient is φ = 232508320.

The previous prime is 243414203. The next prime is 243414251. The reversal of 243414221 is 122414342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243414221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243414251) 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, 10550 + ... + 24456.

It is an arithmetic number, because the mean of its divisors is an integer number (31793688).

Almost surely, 2^243414221 is an apocalyptic number.

It is an amenable number.

243414221 is a deficient number, since it is larger than the sum of its proper divisors (10935283).

243414221 is a wasteful number, since it uses less digits than its factorization.

243414221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14691.

The product of its digits is 1536, while the sum is 23.

The square root of 243414221 is about 15601.7377557758. The cubic root of 243414221 is about 624.3795194634.

Adding to 243414221 its reverse (122414342), we get a palindrome (365828563).

The spelling of 243414221 in words is "two hundred forty-three million, four hundred fourteen thousand, two hundred twenty-one".