221093 has 2 divisors, whose sum is σ = 221094. Its totient is φ = 221092.
The previous prime is 221087. The next prime is 221101. The reversal of 221093 is 390122.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 214369 + 6724 = 463^2 + 82^2 .
It is a cyclic number.
It is not a de Polignac number, because 221093 - 24 = 221077 is a prime.
It is a super-2 number, since 2×2210932 = 97764229298, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (221083) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110546 + 110547.
It is an arithmetic number, because the mean of its divisors is an integer number (110547).
2221093 is an apocalyptic number.
It is an amenable number.
221093 is a deficient number, since it is larger than the sum of its proper divisors (1).
221093 is an equidigital number, since it uses as much as digits as its factorization.
221093 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 108, while the sum is 17.
The square root of 221093 is about 470.2052743218. The cubic root of 221093 is about 60.4679155062.
The spelling of 221093 in words is "two hundred twenty-one thousand, ninety-three".
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