25530173 has 4 divisors (see below), whose sum is σ = 25558080. Its totient is φ = 25502268.

The previous prime is 25530157. The next prime is 25530187. The reversal of 25530173 is 37103552.

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 not a de Polignac number, because 25530173 - 2⁴ = 25530157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530133) 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, 12533 + ... + 14426.

It is an arithmetic number, because the mean of its divisors is an integer number (6389520).

Almost surely, 2^25530173 is an apocalyptic number.

It is an amenable number.

25530173 is a deficient number, since it is larger than the sum of its proper divisors (27907).

25530173 is an equidigital number, since it uses as much as digits as its factorization.

25530173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27906.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 25530173 is about 5052.7391581201. The cubic root of 25530173 is about 294.4543124839.

The spelling of 25530173 in words is "twenty-five million, five hundred thirty thousand, one hundred seventy-three".