24221243 has 4 divisors (see below), whose sum is σ = 25646040. Its totient is φ = 22796448.

The previous prime is 24221233. The next prime is 24221251. The reversal of 24221243 is 34212242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 24221243 - 2⁴ = 24221227 is a prime.

It is a super-2 number, since 2×24221243² = 1173337224930098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24221203) 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, 712373 + ... + 712406.

It is an arithmetic number, because the mean of its divisors is an integer number (6411510).

Almost surely, 2^24221243 is an apocalyptic number.

24221243 is a deficient number, since it is larger than the sum of its proper divisors (1424797).

24221243 is a wasteful number, since it uses less digits than its factorization.

24221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424796.

The product of its digits is 768, while the sum is 20.

The square root of 24221243 is about 4921.5082037928. The cubic root of 24221243 is about 289.3335588222. Note that the first 3 decimals are identical.

Adding to 24221243 its reverse (34212242), we get a palindrome (58433485).

Subtracting 24221243 from its reverse (34212242), we obtain a palindrome (9990999).

The spelling of 24221243 in words is "twenty-four million, two hundred twenty-one thousand, two hundred forty-three".