25324513 has 4 divisors (see below), whose sum is σ = 25802388. Its totient is φ = 24846640.

The previous prime is 25324501. The next prime is 25324529. The reversal of 25324513 is 31542352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21455424 + 3869089 = 4632^2 + 1967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25324513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25324913) 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, 238858 + ... + 238963.

It is an arithmetic number, because the mean of its divisors is an integer number (6450597).

Almost surely, 2^25324513 is an apocalyptic number.

It is an amenable number.

25324513 is a deficient number, since it is larger than the sum of its proper divisors (477875).

25324513 is an equidigital number, since it uses as much as digits as its factorization.

25324513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477874.

The product of its digits is 3600, while the sum is 25.

The square root of 25324513 is about 5032.3466692985. The cubic root of 25324513 is about 293.6615144379.

Adding to 25324513 its reverse (31542352), we get a palindrome (56866865).

The spelling of 25324513 in words is "twenty-five million, three hundred twenty-four thousand, five hundred thirteen".