25320855 has 32 divisors (see below), whose sum is σ = 46540800. Its totient is φ = 11515392.

The previous prime is 25320829. The next prime is 25320877. The reversal of 25320855 is 55802352.

It is not a de Polignac number, because 25320855 - 2¹¹ = 25318807 is a prime.

It is a super-2 number, since 2×25320855² = 1282291395862050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 24591 + ... + 25599.

It is an arithmetic number, because the mean of its divisors is an integer number (1454400).

Almost surely, 2^25320855 is an apocalyptic number.

25320855 is a deficient number, since it is larger than the sum of its proper divisors (21219945).

25320855 is a wasteful number, since it uses less digits than its factorization.

25320855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 25320855 is about 5031.9832074442. The cubic root of 25320855 is about 293.6473744418.

The spelling of 25320855 in words is "twenty-five million, three hundred twenty thousand, eight hundred fifty-five".