221134224 has 20 divisors (see below), whose sum is σ = 571263536. Its totient is φ = 73711392.

The previous prime is 221134223. The next prime is 221134241. The reversal of 221134224 is 422431122.

221134224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221134224.

It is not an unprimeable number, because it can be changed into a prime (221134223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303434 + ... + 2303529.

Almost surely, 2^221134224 is an apocalyptic number.

221134224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221134224 is an abundant number, since it is smaller than the sum of its proper divisors (350129312).

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

221134224 is a wasteful number, since it uses less digits than its factorization.

221134224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606974 (or 4606968 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 221134224 is about 14870.5825037219. The cubic root of 221134224 is about 604.7167346388.

Adding to 221134224 its reverse (422431122), we get a palindrome (643565346).

The spelling of 221134224 in words is "two hundred twenty-one million, one hundred thirty-four thousand, two hundred twenty-four".