25195855 has 4 divisors (see below), whose sum is σ = 30235032. Its totient is φ = 20156680.

The previous prime is 25195823. The next prime is 25195871. The reversal of 25195855 is 55859152.

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

It is not a de Polignac number, because 25195855 - 2⁵ = 25195823 is a prime.

It is a super-2 number, since 2×25195855² = 1269662218362050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519581 + ... + 2519590.

It is an arithmetic number, because the mean of its divisors is an integer number (7558758).

Almost surely, 2^25195855 is an apocalyptic number.

25195855 is a deficient number, since it is larger than the sum of its proper divisors (5039177).

25195855 is an equidigital number, since it uses as much as digits as its factorization.

25195855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039176.

The product of its digits is 90000, while the sum is 40.

The square root of 25195855 is about 5019.5472903440. The cubic root of 25195855 is about 293.1633664394.

The spelling of 25195855 in words is "twenty-five million, one hundred ninety-five thousand, eight hundred fifty-five".