221204134 has 8 divisors (see below), whose sum is σ = 331952040. Its totient is φ = 110553456.

The previous prime is 221204129. The next prime is 221204161. The reversal of 221204134 is 431402122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18324 + ... + 27895.

It is an arithmetic number, because the mean of its divisors is an integer number (41494005).

Almost surely, 2^221204134 is an apocalyptic number.

221204134 is a deficient number, since it is larger than the sum of its proper divisors (110747906).

221204134 is a wasteful number, since it uses less digits than its factorization.

221204134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48614.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221204134 is about 14872.9329320077. The cubic root of 221204134 is about 604.7804535450.

Adding to 221204134 its reverse (431402122), we get a palindrome (652606256).

The spelling of 221204134 in words is "two hundred twenty-one million, two hundred four thousand, one hundred thirty-four".