221443134 has 32 divisors (see below), whose sum is σ = 487679616. Its totient is φ = 66474720.

The previous prime is 221443133. The next prime is 221443153. The reversal of 221443134 is 431344122.

221443134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221443133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8617 + ... + 22740.

It is an arithmetic number, because the mean of its divisors is an integer number (15239988).

Almost surely, 2^221443134 is an apocalyptic number.

221443134 is an abundant number, since it is smaller than the sum of its proper divisors (266236482).

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

221443134 is a wasteful number, since it uses less digits than its factorization.

221443134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31480.

The product of its digits is 2304, while the sum is 24.

The square root of 221443134 is about 14880.9654928704. The cubic root of 221443134 is about 604.9981868215.

Adding to 221443134 its reverse (431344122), we get a palindrome (652787256).

The spelling of 221443134 in words is "two hundred twenty-one million, four hundred forty-three thousand, one hundred thirty-four".