221159 has 2 divisors, whose sum is σ = 221160.
Its totient is φ = 221158.
The previous prime is 221101. The next prime is 221171. The reversal of 221159 is 951122.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 221159 - 28 = 220903 is a prime.
It is a super-2 number, since 2×2211592 = 97822606562, which contains 22 as substring.
It is a Sophie Germain prime.
It is a Chen prime.
It is a plaindrome in base 15.
It is a self number, because there is not a number n which added to its sum of digits gives 221159.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (221059) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110579 + 110580.
It is an arithmetic number, because the mean of its divisors is an integer number (110580).
2221159 is an apocalyptic number.
221159 is a deficient number, since it is larger than the sum of its proper divisors (1).
221159 is an equidigital number, since it uses as much as digits as its factorization.
221159 is an evil number, because the sum of its binary digits is even.
The product of its digits is 180, while the sum is 20.
The square root of 221159 is about 470.2754511986.
The cubic root of 221159 is about 60.4739318060.
The spelling of 221159 in words is "two hundred twenty-one thousand, one hundred fifty-nine".