221092210 has 8 divisors (see below), whose sum is σ = 397965996. Its totient is φ = 88436880.

The previous prime is 221092181. The next prime is 221092211. The reversal of 221092210 is 12290122.

It can be written as a sum of positive squares in 2 ways, for example, as 207849889 + 13242321 = 14417^2 + 3639^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221092211) 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, 11054601 + ... + 11054620.

Almost surely, 2^221092210 is an apocalyptic number.

221092210 is a deficient number, since it is larger than the sum of its proper divisors (176873786).

221092210 is a wasteful number, since it uses less digits than its factorization.

221092210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22109228.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 221092210 is about 14869.1697818002. The cubic root of 221092210 is about 604.6784348562.

The spelling of 221092210 in words is "two hundred twenty-one million, ninety-two thousand, two hundred ten".