24042221 has 4 divisors (see below), whose sum is σ = 27476832. Its totient is φ = 20607612.

The previous prime is 24042211. The next prime is 24042223. The reversal of 24042221 is 12224042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24042221 is a prime.

It is a super-2 number, since 2×24042221² = 1156056781225682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24042223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1717295 + ... + 1717308.

It is an arithmetic number, because the mean of its divisors is an integer number (6869208).

Almost surely, 2^24042221 is an apocalyptic number.

It is an amenable number.

24042221 is a deficient number, since it is larger than the sum of its proper divisors (3434611).

24042221 is an equidigital number, since it uses as much as digits as its factorization.

24042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434610.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 24042221 is about 4903.2867548207. The cubic root of 24042221 is about 288.6189628004.

Adding to 24042221 its reverse (12224042), we get a palindrome (36266263).

The spelling of 24042221 in words is "twenty-four million, forty-two thousand, two hundred twenty-one".