221402 has 8 divisors (see below), whose sum is σ = 342912. Its totient is φ = 107100.
The previous prime is 221401. The next prime is 221411. The reversal of 221402 is 204122.
221402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (221401) 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, 1724 + ... + 1847.
It is an arithmetic number, because the mean of its divisors is an integer number (42864).
2221402 is an apocalyptic number.
221402 is a deficient number, since it is larger than the sum of its proper divisors (121510).
221402 is a wasteful number, since it uses less digits than its factorization.
221402 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3604.
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 221402 is about 470.5337394917. The cubic root of 221402 is about 60.4960724177.
Adding to 221402 its reverse (204122), we get a palindrome (425524).
The spelling of 221402 in words is "two hundred twenty-one thousand, four hundred two", and thus it is an iban number.
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