221232243 has 8 divisors (see below), whose sum is σ = 301252608. Its totient is φ = 144350024.

The previous prime is 221232223. The next prime is 221232247. The reversal of 221232243 is 342232122.

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 221232243 - 2⁵ = 221232211 is a prime.

It is a super-2 number, since 2×221232243² = 97887410685622098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221232247) 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, 784371 + ... + 784652.

It is an arithmetic number, because the mean of its divisors is an integer number (37656576).

Almost surely, 2^221232243 is an apocalyptic number.

221232243 is a deficient number, since it is larger than the sum of its proper divisors (80020365).

221232243 is a wasteful number, since it uses less digits than its factorization.

221232243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569073.

The product of its digits is 1152, while the sum is 21.

The square root of 221232243 is about 14873.8778736414. The cubic root of 221232243 is about 604.8060694824.

Adding to 221232243 its reverse (342232122), we get a palindrome (563464365).

The spelling of 221232243 in words is "two hundred twenty-one million, two hundred thirty-two thousand, two hundred forty-three".