221361199 has 4 divisors (see below), whose sum is σ = 234382464. Its totient is φ = 208339936.

The previous prime is 221361197. The next prime is 221361227. The reversal of 221361199 is 991163122.

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 221361199 - 2¹ = 221361197 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 (221361193) 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, 6510607 + ... + 6510640.

It is an arithmetic number, because the mean of its divisors is an integer number (58595616).

Almost surely, 2^221361199 is an apocalyptic number.

221361199 is a deficient number, since it is larger than the sum of its proper divisors (13021265).

221361199 is a wasteful number, since it uses less digits than its factorization.

221361199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13021264.

The product of its digits is 5832, while the sum is 34.

The square root of 221361199 is about 14878.2122245920. The cubic root of 221361199 is about 604.9235602262.

The spelling of 221361199 in words is "two hundred twenty-one million, three hundred sixty-one thousand, one hundred ninety-nine".