221448 has 16 divisors (see below), whose sum is σ = 553680. Its totient is φ = 73808.

The previous prime is 221447. The next prime is 221453. The reversal of 221448 is 844122.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (221447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4590 + ... + 4637.

It is an arithmetic number, because the mean of its divisors is an integer number (34605).

2²²¹⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

221448 is an abundant number, since it is smaller than the sum of its proper divisors (332232).

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

221448 is a wasteful number, since it uses less digits than its factorization.

221448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236 (or 9232 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 221448 is about 470.5826176135. The cubic root of 221448 is about 60.5002618207.

The spelling of 221448 in words is "two hundred twenty-one thousand, four hundred forty-eight".