221434 has 8 divisors (see below), whose sum is σ = 338580. Its totient is φ = 108576.

The previous prime is 221413. The next prime is 221447. The reversal of 221434 is 434122.

221434 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 198025 + 23409 = 445^2 + 153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939 + ... + 1150.

2²²¹⁴³⁴ is an apocalyptic number.

221434 is a deficient number, since it is larger than the sum of its proper divisors (117146).

221434 is a wasteful number, since it uses less digits than its factorization.

221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144.

The product of its digits is 192, while the sum is 16.

The square root of 221434 is about 470.5677422008. The cubic root of 221434 is about 60.4989868464.

Adding to 221434 its reverse (434122), we get a palindrome (655556).

The spelling of 221434 in words is "two hundred twenty-one thousand, four hundred thirty-four".