221343234 has 32 divisors (see below), whose sum is σ = 506373120. Its totient is φ = 63185232.

The previous prime is 221343173. The next prime is 221343251. The reversal of 221343234 is 432343122.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81787 + ... + 84449.

It is an arithmetic number, because the mean of its divisors is an integer number (15824160).

Almost surely, 2^221343234 is an apocalyptic number.

221343234 is an abundant number, since it is smaller than the sum of its proper divisors (285029886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221343234 is a wasteful number, since it uses less digits than its factorization.

221343234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654.

The product of its digits is 3456, while the sum is 24.

The square root of 221343234 is about 14877.6084771713. The cubic root of 221343234 is about 604.9071951995.

Adding to 221343234 its reverse (432343122), we get a palindrome (653686356).

The spelling of 221343234 in words is "two hundred twenty-one million, three hundred forty-three thousand, two hundred thirty-four".