25555000 has 80 divisors (see below), whose sum is σ = 63261000. Its totient is φ = 9648000.

The previous prime is 25554989. The next prime is 25555007. The reversal of 25555000 is 55552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94866 + ... + 95134.

Almost surely, 2^25555000 is an apocalyptic number.

25555000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31630500).

25555000 is an abundant number, since it is smaller than the sum of its proper divisors (37706000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25555000 is a wasteful number, since it uses less digits than its factorization.

25555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 25555000 is about 5055.1953473629. The cubic root of 25555000 is about 294.5497296309.

It can be divided in two parts, 255 and 55000, that added together give a palindrome (55255).

The spelling of 25555000 in words is "twenty-five million, five hundred fifty-five thousand".