222401 has 4 divisors (see below), whose sum is σ = 230100. Its totient is φ = 214704.
The previous prime is 222389. The next prime is 222403. The reversal of 222401 is 104222.
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 172225 + 50176 = 415^2 + 224^2 .
It is a cyclic number.
It is not a de Polignac number, because 222401 - 26 = 222337 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a nialpdrome in base 12.
It is not an unprimeable number, because it can be changed into a prime (222403) 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, 3806 + ... + 3863.
It is an arithmetic number, because the mean of its divisors is an integer number (57525).
2222401 is an apocalyptic number.
It is an amenable number.
222401 is a deficient number, since it is larger than the sum of its proper divisors (7699).
222401 is an equidigital number, since it uses as much as digits as its factorization.
222401 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7698.
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 222401 is about 471.5941051370. The cubic root of 222401 is about 60.5869251129.
Adding to 222401 its reverse (104222), we get a palindrome (326623).
The spelling of 222401 in words is "two hundred twenty-two thousand, four hundred one", and thus it is an iban number.
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