221194 has 4 divisors (see below), whose sum is σ = 331794. Its totient is φ = 110596.

The previous prime is 221173. The next prime is 221197. The reversal of 221194 is 491122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491122 = 2 ⋅245561.

It can be written as a sum of positive squares in only one way, i.e., 170569 + 50625 = 413^2 + 225^2 .

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55297 + ... + 55300.

2²²¹¹⁹⁴ is an apocalyptic number.

221194 is a deficient number, since it is larger than the sum of its proper divisors (110600).

221194 is a wasteful number, since it uses less digits than its factorization.

221194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110599.

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

The square root of 221194 is about 470.3126619601. The cubic root of 221194 is about 60.4771217824.

The spelling of 221194 in words is "two hundred twenty-one thousand, one hundred ninety-four".