25530169 has 4 divisors (see below), whose sum is σ = 29177344. Its totient is φ = 21882996.

The previous prime is 25530157. The next prime is 25530187. The reversal of 25530169 is 96103552.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25530169 is a prime.

It is a super-2 number, since 2×25530169² = 1303579058337122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25530169.

It is not an unprimeable number, because it can be changed into a prime (25530139) 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, 1823577 + ... + 1823590.

It is an arithmetic number, because the mean of its divisors is an integer number (7294336).

Almost surely, 2^25530169 is an apocalyptic number.

It is an amenable number.

25530169 is a deficient number, since it is larger than the sum of its proper divisors (3647175).

25530169 is an equidigital number, since it uses as much as digits as its factorization.

25530169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647174.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 25530169 is about 5052.7387622952. The cubic root of 25530169 is about 294.4542971058.

The spelling of 25530169 in words is "twenty-five million, five hundred thirty thousand, one hundred sixty-nine".