243352221 has 8 divisors (see below), whose sum is σ = 370822464. Its totient is φ = 139058400.

The previous prime is 243352211. The next prime is 243352223. The reversal of 243352221 is 122253342.

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

It is not a de Polignac number, because 243352221 - 2¹⁸ = 243090077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243352191 and 243352200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243352223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5794080 + ... + 5794121.

It is an arithmetic number, because the mean of its divisors is an integer number (46352808).

Almost surely, 2^243352221 is an apocalyptic number.

243352221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243352221 is a deficient number, since it is larger than the sum of its proper divisors (127470243).

243352221 is a wasteful number, since it uses less digits than its factorization.

243352221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11588211.

The product of its digits is 2880, while the sum is 24.

The square root of 243352221 is about 15599.7506710845. The cubic root of 243352221 is about 624.3265030904.

The spelling of 243352221 in words is "two hundred forty-three million, three hundred fifty-two thousand, two hundred twenty-one".