221192 has 16 divisors (see below), whose sum is σ = 425040. Its totient is φ = 107856.

The previous prime is 221173. The next prime is 221197. The reversal of 221192 is 291122.

It is a self number, because there is not a number n which added to its sum of digits gives 221192.

It is not an unprimeable number, because it can be changed into a prime (221197) by changing a digit.

221192 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (26565).

2²²¹¹⁹² is an apocalyptic number.

It is an amenable number.

221192 is a deficient number, since it is larger than the sum of its proper divisors (203848).

221192 is a wasteful number, since it uses less digits than its factorization.

221192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 688 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 221192 is about 470.3105357102. The cubic root of 221192 is about 60.4769395071.

The spelling of 221192 in words is "two hundred twenty-one thousand, one hundred ninety-two".