221254 has 16 divisors (see below), whose sum is σ = 369360. Its totient is φ = 98560.

The previous prime is 221251. The next prime is 221261. The reversal of 221254 is 452122.

221254 = T₁₈₆ + T₁₈₇ + ... + T₁₉₇.

221254 is nontrivially palindromic in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221251) 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 7 ways as a sum of consecutive naturals, for example, 1902 + ... + 2014.

It is an arithmetic number, because the mean of its divisors is an integer number (23085).

2²²¹²⁵⁴ is an apocalyptic number.

221254 is a deficient number, since it is larger than the sum of its proper divisors (148106).

221254 is a wasteful number, since it uses less digits than its factorization.

221254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215.

The product of its digits is 160, while the sum is 16.

The square root of 221254 is about 470.3764449885. The cubic root of 221254 is about 60.4825895306.

Adding to 221254 its reverse (452122), we get a palindrome (673376).

The spelling of 221254 in words is "two hundred twenty-one thousand, two hundred fifty-four".