224221404 has 24 divisors (see below), whose sum is σ = 570745728. Its totient is φ = 67945840.

The previous prime is 224221399. The next prime is 224221409. The reversal of 224221404 is 404122422.

It is an interprime number because it is at equal distance from previous prime (224221399) and next prime (224221409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224221409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849192 + ... + 849455.

It is an arithmetic number, because the mean of its divisors is an integer number (23781072).

Almost surely, 2^224221404 is an apocalyptic number.

It is an amenable number.

224221404 is an abundant number, since it is smaller than the sum of its proper divisors (346524324).

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

224221404 is a wasteful number, since it uses less digits than its factorization.

224221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698665 (or 1698663 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 224221404 is about 14974.0243087822. The cubic root of 224221404 is about 607.5178216249.

Adding to 224221404 its reverse (404122422), we get a palindrome (628343826).

The spelling of 224221404 in words is "two hundred twenty-four million, two hundred twenty-one thousand, four hundred four".