25453531 has 4 divisors (see below), whose sum is σ = 25870864. Its totient is φ = 25036200.

The previous prime is 25453523. The next prime is 25453553. The reversal of 25453531 is 13535452.

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 25453531 - 2³ = 25453523 is a prime.

It is a super-2 number, since 2×25453531² = 1295764480735922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25453531.

It is not an unprimeable number, because it can be changed into a prime (25453231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208575 + ... + 208696.

It is an arithmetic number, because the mean of its divisors is an integer number (6467716).

Almost surely, 2^25453531 is an apocalyptic number.

25453531 is a deficient number, since it is larger than the sum of its proper divisors (417333).

25453531 is an equidigital number, since it uses as much as digits as its factorization.

25453531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417332.

The product of its digits is 9000, while the sum is 28.

The square root of 25453531 is about 5045.1492544820. The cubic root of 25453531 is about 294.1593649083.

Adding to 25453531 its reverse (13535452), we get a palindrome (38988983).

The spelling of 25453531 in words is "twenty-five million, four hundred fifty-three thousand, five hundred thirty-one".