25131 has 4 divisors (see below), whose sum is σ = 33512. Its totient is φ = 16752.

The previous prime is 25127. The next prime is 25147. The reversal of 25131 is 13152.

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

It is not a de Polignac number, because 25131 - 2² = 25127 is a prime.

It is a super-2 number, since 2×25131² = 1263134322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25131.

It is not an unprimeable number, because it can be changed into a prime (25111) 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, 4186 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (8378).

2²⁵¹³¹ is an apocalyptic number.

25131 is a deficient number, since it is larger than the sum of its proper divisors (8381).

25131 is an equidigital number, since it uses as much as digits as its factorization.

25131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380.

The product of its digits is 30, while the sum is 12.

The square root of 25131 is about 158.5276001206. The cubic root of 25131 is about 29.2911612768.

Adding to 25131 its reverse (13152), we get a palindrome (38283).

It can be divided in two parts, 251 and 31, that added together give a palindrome (282).

The spelling of 25131 in words is "twenty-five thousand, one hundred thirty-one".