25351 has 4 divisors (see below), whose sum is σ = 25704. Its totient is φ = 25000.

The previous prime is 25349. The next prime is 25357. The reversal of 25351 is 15352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(25351) divides (25351-1)³.

It is a cyclic number.

It is not a de Polignac number, because 25351 - 2¹ = 25349 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 226.

It is an arithmetic number, because the mean of its divisors is an integer number (6426).

2²⁵³⁵¹ is an apocalyptic number.

25351 is the 101-st heptagonal number.

25351 is a deficient number, since it is larger than the sum of its proper divisors (353).

25351 is a wasteful number, since it uses less digits than its factorization.

25351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its digits is 150, while the sum is 16.

The square root of 25351 is about 159.2199736214. The cubic root of 25351 is about 29.3763859313.

Subtracting from 25351 its reverse (15352), we obtain a palindrome (9999).

The spelling of 25351 in words is "twenty-five thousand, three hundred fifty-one".