221134404 has 24 divisors (see below), whose sum is σ = 520717120. Its totient is φ = 73034784.

The previous prime is 221134387. The next prime is 221134411. The reversal of 221134404 is 404431122.

221134404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83224 + ... + 85839.

Almost surely, 2^221134404 is an apocalyptic number.

It is an amenable number.

221134404 is an abundant number, since it is smaller than the sum of its proper divisors (299582716).

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

221134404 is a wasteful number, since it uses less digits than its factorization.

221134404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169179 (or 169177 counting only the distinct ones).

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

The square root of 221134404 is about 14870.5885559382. The cubic root of 221134404 is about 604.7168987156.

Adding to 221134404 its reverse (404431122), we get a palindrome (625565526).

The spelling of 221134404 in words is "two hundred twenty-one million, one hundred thirty-four thousand, four hundred four".