25132531 has 4 divisors (see below), whose sum is σ = 25999200. Its totient is φ = 24265864.

The previous prime is 25132529. The next prime is 25132553. The reversal of 25132531 is 13523152.

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 25132531 - 2¹ = 25132529 is a prime.

It is a super-2 number, since 2×25132531² = 1263288228931922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25132501) 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, 433291 + ... + 433348.

It is an arithmetic number, because the mean of its divisors is an integer number (6499800).

Almost surely, 2^25132531 is an apocalyptic number.

25132531 is a deficient number, since it is larger than the sum of its proper divisors (866669).

25132531 is an equidigital number, since it uses as much as digits as its factorization.

25132531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866668.

The product of its digits is 900, while the sum is 22.

The square root of 25132531 is about 5013.2355819371. The cubic root of 25132531 is about 292.9175607818.

Adding to 25132531 its reverse (13523152), we get a palindrome (38655683).

The spelling of 25132531 in words is "twenty-five million, one hundred thirty-two thousand, five hundred thirty-one".