24851 has 2 divisors, whose sum is σ = 24852. Its totient is φ = 24850.

The previous prime is 24847. The next prime is 24859. The reversal of 24851 is 15842.

24851 = T₈₈ + T₈₉ + ... + T₉₃.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24851 - 2² = 24847 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (24859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12425 + 12426.

It is an arithmetic number, because the mean of its divisors is an integer number (12426).

2²⁴⁸⁵¹ is an apocalyptic number.

24851 is the 71-st centered decagonal number.

24851 is a deficient number, since it is larger than the sum of its proper divisors (1).

24851 is an equidigital number, since it uses as much as digits as its factorization.

24851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 24851 is about 157.6419994798. The cubic root of 24851 is about 29.1819711063.

Subtracting from 24851 its product of digits (320), we obtain a triangular number (24531 = T₂₂₁).

Subtracting from 24851 its reverse (15842), we obtain a palindrome (9009).

The spelling of 24851 in words is "twenty-four thousand, eight hundred fifty-one".