221346589 has 4 divisors (see below), whose sum is σ = 228979260. Its totient is φ = 213713920.

The previous prime is 221346571. The next prime is 221346611. The reversal of 221346589 is 985643122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145395364 + 75951225 = 12058^2 + 8715^2 .

It is a cyclic number.

It is not a de Polignac number, because 221346589 - 2¹⁵ = 221313821 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221346509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3816292 + ... + 3816349.

It is an arithmetic number, because the mean of its divisors is an integer number (57244815).

Almost surely, 2^221346589 is an apocalyptic number.

221346589 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

221346589 is a deficient number, since it is larger than the sum of its proper divisors (7632671).

221346589 is an equidigital number, since it uses as much as digits as its factorization.

221346589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632670.

The product of its digits is 103680, while the sum is 40.

The square root of 221346589 is about 14877.7212300809. The cubic root of 221346589 is about 604.9102514685.

The spelling of 221346589 in words is "two hundred twenty-one million, three hundred forty-six thousand, five hundred eighty-nine".