24228509 has 2 divisors, whose sum is σ = 24228510. Its totient is φ = 24228508.

The previous prime is 24228469. The next prime is 24228511. The reversal of 24228509 is 90582242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 120409 = 4910^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 24228509 - 2¹² = 24224413 is a prime.

Together with 24228511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24228539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12114254 + 12114255.

It is an arithmetic number, because the mean of its divisors is an integer number (12114255).

Almost surely, 2^24228509 is an apocalyptic number.

It is an amenable number.

24228509 is a deficient number, since it is larger than the sum of its proper divisors (1).

24228509 is an equidigital number, since it uses as much as digits as its factorization.

24228509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 24228509 is about 4922.2463367857. The cubic root of 24228509 is about 289.3624878007.

The spelling of 24228509 in words is "twenty-four million, two hundred twenty-eight thousand, five hundred nine".