221323199 has 4 divisors (see below), whose sum is σ = 221482800. Its totient is φ = 221163600.

The previous prime is 221323171. The next prime is 221323211. The reversal of 221323199 is 991323122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221323199 - 2¹² = 221319103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323139) 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, 77702 + ... + 80499.

It is an arithmetic number, because the mean of its divisors is an integer number (55370700).

Almost surely, 2^221323199 is an apocalyptic number.

221323199 is a deficient number, since it is larger than the sum of its proper divisors (159601).

221323199 is a wasteful number, since it uses less digits than its factorization.

221323199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159600.

The product of its digits is 5832, while the sum is 32.

The square root of 221323199 is about 14876.9351346304. The cubic root of 221323199 is about 604.8889434838. Note that the first 3 decimals are identical.

The spelling of 221323199 in words is "two hundred twenty-one million, three hundred twenty-three thousand, one hundred ninety-nine".