25580279 has 4 divisors (see below), whose sum is σ = 25904160. Its totient is φ = 25256400.

The previous prime is 25580249. The next prime is 25580293. The reversal of 25580279 is 97208552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25580279 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 (25580249) 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, 161822 + ... + 161979.

It is an arithmetic number, because the mean of its divisors is an integer number (6476040).

Almost surely, 2^25580279 is an apocalyptic number.

25580279 is a deficient number, since it is larger than the sum of its proper divisors (323881).

25580279 is an equidigital number, since it uses as much as digits as its factorization.

25580279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323880.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 25580279 is about 5057.6950283701. The cubic root of 25580279 is about 294.6468204649.

The spelling of 25580279 in words is "twenty-five million, five hundred eighty thousand, two hundred seventy-nine".