221154 has 32 divisors (see below), whose sum is σ = 483840. Its totient is φ = 67200.

The previous prime is 221101. The next prime is 221159. The reversal of 221154 is 451122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5374 + ... + 5414.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2²²¹¹⁵⁴ is an apocalyptic number.

221154 is an abundant number, since it is smaller than the sum of its proper divisors (262686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221154 is a wasteful number, since it uses less digits than its factorization.

221154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106.

The product of its digits is 80, while the sum is 15.

The square root of 221154 is about 470.2701351351. The cubic root of 221154 is about 60.4734760677.

Adding to 221154 its reverse (451122), we get a palindrome (672276).

It can be divided in two parts, 22 and 1154, that added together give a triangular number (1176 = T₄₈).

The spelling of 221154 in words is "two hundred twenty-one thousand, one hundred fifty-four".