24551 has 2 divisors, whose sum is σ = 24552. Its totient is φ = 24550.

The previous prime is 24547. The next prime is 24571. The reversal of 24551 is 15542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24551 - 2² = 24547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12275 + 12276.

It is an arithmetic number, because the mean of its divisors is an integer number (12276).

2²⁴⁵⁵¹ is an apocalyptic number.

24551 is a deficient number, since it is larger than the sum of its proper divisors (1).

24551 is an equidigital number, since it uses as much as digits as its factorization.

24551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 17.

The square root of 24551 is about 156.6875872557. The cubic root of 24551 is about 29.0640676304.

Subtracting from 24551 its reverse (15542), we obtain a palindrome (9009).

It can be divided in two parts, 24 and 551, that added together give a palindrome (575).

The spelling of 24551 in words is "twenty-four thousand, five hundred fifty-one".