25813855 has 8 divisors (see below), whose sum is σ = 31976064. Its totient is φ = 19984800.

The previous prime is 25813847. The next prime is 25813859. The reversal of 25813855 is 55831852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25813855 - 2³ = 25813847 is a prime.

It is a super-2 number, since 2×25813855² = 1332710219922050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25813859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83116 + ... + 83425.

It is an arithmetic number, because the mean of its divisors is an integer number (3997008).

Almost surely, 2^25813855 is an apocalyptic number.

25813855 is a deficient number, since it is larger than the sum of its proper divisors (6162209).

25813855 is a wasteful number, since it uses less digits than its factorization.

25813855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166577.

The product of its digits is 48000, while the sum is 37.

The square root of 25813855 is about 5080.7337068577. The cubic root of 25813855 is about 295.5409207886.

The spelling of 25813855 in words is "twenty-five million, eight hundred thirteen thousand, eight hundred fifty-five".