24225221 has 8 divisors (see below), whose sum is σ = 25795224. Its totient is φ = 22671360.

The previous prime is 24225199. The next prime is 24225239. The reversal of 24225221 is 12252242.

It can be written as a sum of positive squares in 4 ways, for example, as 264196 + 23961025 = 514^2 + 4895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24225221 is a prime.

It is a super-2 number, since 2×24225221² = 1173722664997682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24225193 and 24225202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24225241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (3224403).

Almost surely, 2^24225221 is an apocalyptic number.

It is an amenable number.

24225221 is a deficient number, since it is larger than the sum of its proper divisors (1570003).

24225221 is a wasteful number, since it uses less digits than its factorization.

24225221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071.

The product of its digits is 640, while the sum is 20.

The square root of 24225221 is about 4921.9123316045. The cubic root of 24225221 is about 289.3493976170.

Adding to 24225221 its reverse (12252242), we get a palindrome (36477463).

The spelling of 24225221 in words is "twenty-four million, two hundred twenty-five thousand, two hundred twenty-one".