221452 has 24 divisors (see below), whose sum is σ = 483840. Its totient is φ = 86160.

The previous prime is 221447. The next prime is 221453. The reversal of 221452 is 254122.

It is not an unprimeable number, because it can be changed into a prime (221453) 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, 52 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2²²¹⁴⁵² is an apocalyptic number.

221452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221452 is an abundant number, since it is smaller than the sum of its proper divisors (262388).

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

221452 is a wasteful number, since it uses less digits than its factorization.

221452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

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

The square root of 221452 is about 470.5868676451. The cubic root of 221452 is about 60.5006260892.

Adding to 221452 its reverse (254122), we get a palindrome (475574).

The spelling of 221452 in words is "two hundred twenty-one thousand, four hundred fifty-two".