221700190 has 16 divisors (see below), whose sum is σ = 399440160. Its totient is φ = 88595680.

The previous prime is 221700181. The next prime is 221700209. The reversal of 221700190 is 91007122.

It is a super-2 number, since 2×221700190² = 98301948492072200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 21085.

It is an arithmetic number, because the mean of its divisors is an integer number (24965010).

Almost surely, 2^221700190 is an apocalyptic number.

221700190 is a deficient number, since it is larger than the sum of its proper divisors (177739970).

221700190 is a wasteful number, since it uses less digits than its factorization.

221700190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 221700190 is about 14889.6000617881. The cubic root of 221700190 is about 605.2321946433.

The spelling of 221700190 in words is "two hundred twenty-one million, seven hundred thousand, one hundred ninety".