24222421 has 4 divisors (see below), whose sum is σ = 24239052. Its totient is φ = 24205792.

The previous prime is 24222413. The next prime is 24222449. The reversal of 24222421 is 12422242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11655396 + 12567025 = 3414^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 24222421 - 2³ = 24222413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24222491) 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, 5896 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (6059763).

Almost surely, 2^24222421 is an apocalyptic number.

It is an amenable number.

24222421 is a deficient number, since it is larger than the sum of its proper divisors (16631).

24222421 is a wasteful number, since it uses less digits than its factorization.

24222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630.

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

The square root of 24222421 is about 4921.6278810979. The cubic root of 24222421 is about 289.3382493248.

Adding to 24222421 its reverse (12422242), we get a palindrome (36644663).

The spelling of 24222421 in words is "twenty-four million, two hundred twenty-two thousand, four hundred twenty-one".