25500500 has 24 divisors (see below), whose sum is σ = 55694184. Its totient is φ = 10200000.

The previous prime is 25500487. The next prime is 25500509. The reversal of 25500500 is 500552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58564 + 25441936 = 242^2 + 5044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500509) 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 7 ways as a sum of consecutive naturals, for example, 25001 + ... + 26000.

It is an arithmetic number, because the mean of its divisors is an integer number (2320591).

Almost surely, 2^25500500 is an apocalyptic number.

25500500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500500 is an abundant number, since it is smaller than the sum of its proper divisors (30193684).

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

25500500 is a wasteful number, since it uses less digits than its factorization.

25500500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51020 (or 51008 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 25500500 is about 5049.8019763155. The cubic root of 25500500 is about 294.3401896111.

The spelling of 25500500 in words is "twenty-five million, five hundred thousand, five hundred".