221334404 has 24 divisors (see below), whose sum is σ = 390432000. Its totient is φ = 109787040.

The previous prime is 221334403. The next prime is 221334431. The reversal of 221334404 is 404433122.

It is a self number, because there is not a number n which added to its sum of digits gives 221334404.

It is not an unprimeable number, because it can be changed into a prime (221334403) 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, 461837 + ... + 462315.

It is an arithmetic number, because the mean of its divisors is an integer number (16268000).

Almost surely, 2^221334404 is an apocalyptic number.

It is an amenable number.

221334404 is a deficient number, since it is larger than the sum of its proper divisors (169097596).

221334404 is a wasteful number, since it uses less digits than its factorization.

221334404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 221334404 is about 14877.3117195278. The cubic root of 221334404 is about 604.8991512799.

Adding to 221334404 its reverse (404433122), we get a palindrome (625767526).

The spelling of 221334404 in words is "two hundred twenty-one million, three hundred thirty-four thousand, four hundred four".