24224221 has 16 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 18813168.

The previous prime is 24224219. The next prime is 24224273. The reversal of 24224221 is 12242242.

It is a cyclic number.

It is not a de Polignac number, because 24224221 - 2¹ = 24224219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24224281) 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, 901 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (1900800).

Almost surely, 2^24224221 is an apocalyptic number.

It is an amenable number.

24224221 is a deficient number, since it is larger than the sum of its proper divisors (6188579).

24224221 is a wasteful number, since it uses less digits than its factorization.

24224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its digits is 512, while the sum is 19.

The square root of 24224221 is about 4921.8107440250. The cubic root of 24224221 is about 289.3454161827.

Adding to 24224221 its reverse (12242242), we get a palindrome (36466463).

The spelling of 24224221 in words is "twenty-four million, two hundred twenty-four thousand, two hundred twenty-one".