221476 has 12 divisors (see below), whose sum is σ = 410508. Its totient is φ = 104192.

The previous prime is 221471. The next prime is 221477. The reversal of 221476 is 674122.

221476 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 181476 + 40000 = 426^2 + 200^2 .

It is not an unprimeable number, because it can be changed into a prime (221471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561 + ... + 1696.

It is an arithmetic number, because the mean of its divisors is an integer number (34209).

2²²¹⁴⁷⁶ is an apocalyptic number.

It is an amenable number.

221476 is a deficient number, since it is larger than the sum of its proper divisors (189032).

221476 is a wasteful number, since it uses less digits than its factorization.

221476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278 (or 3276 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 221476 is about 470.6123670283. The cubic root of 221476 is about 60.5028116081.

Adding to 221476 its reverse (674122), we get a palindrome (895598).

The spelling of 221476 in words is "two hundred twenty-one thousand, four hundred seventy-six".