25322521 has 4 divisors (see below), whose sum is σ = 28940032. Its totient is φ = 21705012.

The previous prime is 25322489. The next prime is 25322569. The reversal of 25322521 is 12522352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25322521 - 2⁵ = 25322489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25322492 and 25322501.

It is not an unprimeable number, because it can be changed into a prime (20322521) 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, 1808745 + ... + 1808758.

It is an arithmetic number, because the mean of its divisors is an integer number (7235008).

Almost surely, 2^25322521 is an apocalyptic number.

It is an amenable number.

25322521 is a deficient number, since it is larger than the sum of its proper divisors (3617511).

25322521 is an equidigital number, since it uses as much as digits as its factorization.

25322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617510.

The product of its digits is 1200, while the sum is 22.

The square root of 25322521 is about 5032.1487458143. The cubic root of 25322521 is about 293.6538145323.

Adding to 25322521 its reverse (12522352), we get a palindrome (37844873).

The spelling of 25322521 in words is "twenty-five million, three hundred twenty-two thousand, five hundred twenty-one".