25211 has 4 divisors (see below), whose sum is σ = 26712. Its totient is φ = 23712.

The previous prime is 25189. The next prime is 25219. The reversal of 25211 is 11252.

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

It is a cyclic number.

It is not a de Polignac number, because 25211 - 2⁶ = 25147 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 25192 and 25201.

It is not an unprimeable number, because it can be changed into a prime (25219) 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, 725 + ... + 758.

It is an arithmetic number, because the mean of its divisors is an integer number (6678).

2²⁵²¹¹ is an apocalyptic number.

25211 is a deficient number, since it is larger than the sum of its proper divisors (1501).

25211 is a wasteful number, since it uses less digits than its factorization.

25211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500.

The product of its digits is 20, while the sum is 11.

The square root of 25211 is about 158.7797216272. The cubic root of 25211 is about 29.3222093955.

Subtracting from 25211 its sum of digits (11), we obtain a triangular number (25200 = T₂₂₄).

Adding to 25211 its reverse (11252), we get a palindrome (36463).

It can be divided in two parts, 252 and 11, that multiplied together give a palindrome (2772).

The spelling of 25211 in words is "twenty-five thousand, two hundred eleven".