221193 has 12 divisors (see below), whose sum is σ = 365248. Its totient is φ = 126360.

The previous prime is 221173. The next prime is 221197. The reversal of 221193 is 391122.

It is a happy number.

It is not a de Polignac number, because 221193 - 2⁹ = 220681 is a prime.

It is a Duffinian number.

221193 is a lucky number.

It is a zygodrome in base 8.

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 1693 + ... + 1818.

2²²¹¹⁹³ is an apocalyptic number.

It is an amenable number.

221193 is a deficient number, since it is larger than the sum of its proper divisors (144055).

221193 is a wasteful number, since it uses less digits than its factorization.

221193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3521 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 221193 is about 470.3115988363. The cubic root of 221193 is about 60.4770306449.

It can be divided in two parts, 22119 and 3, that added together give a palindrome (22122).

The spelling of 221193 in words is "two hundred twenty-one thousand, one hundred ninety-three".