Search a number
-
+
25231 = 231097
BaseRepresentation
bin110001010001111
31021121111
412022033
51301411
6312451
7133363
oct61217
937544
1025231
1117a58
1212727
13b63b
1492a3
157721
hex628f

25231 has 4 divisors (see below), whose sum is σ = 26352. Its totient is φ = 24112.

The previous prime is 25229. The next prime is 25237. The reversal of 25231 is 13252.

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 25231 - 21 = 25229 is a prime.

It is a super-2 number, since 2×252312 = 1273206722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25237) 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, 526 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (6588).

225231 is an apocalyptic number.

25231 is a deficient number, since it is larger than the sum of its proper divisors (1121).

25231 is a wasteful number, since it uses less digits than its factorization.

25231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120.

The product of its digits is 60, while the sum is 13.

The square root of 25231 is about 158.8426894761. The cubic root of 25231 is about 29.3299611596.

Adding to 25231 its reverse (13252), we get a palindrome (38483).

It can be divided in two parts, 25 and 231, that multiplied together give a palindrome (5775).

The spelling of 25231 in words is "twenty-five thousand, two hundred thirty-one".

Divisors: 1 23 1097 25231