221009199 has 8 divisors (see below), whose sum is σ = 304184832. Its totient is φ = 142586520.

The previous prime is 221009171. The next prime is 221009209. The reversal of 221009199 is 991900122.

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

It is not a de Polignac number, because 221009199 - 2⁷ = 221009071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221005199) 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, 1188129 + ... + 1188314.

It is an arithmetic number, because the mean of its divisors is an integer number (38023104).

Almost surely, 2^221009199 is an apocalyptic number.

221009199 is a deficient number, since it is larger than the sum of its proper divisors (83175633).

221009199 is a wasteful number, since it uses less digits than its factorization.

221009199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376477.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 221009199 is about 14866.3781399506. The cubic root of 221009199 is about 604.6027481176.

The spelling of 221009199 in words is "two hundred twenty-one million, nine thousand, one hundred ninety-nine".