25545500 has 48 divisors (see below), whose sum is σ = 58749600. Its totient is φ = 9676800.

The previous prime is 25545497. The next prime is 25545517. The reversal of 25545500 is 554552.

It is a self number, because there is not a number n which added to its sum of digits gives 25545500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8156 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (1223950).

Almost surely, 2^25545500 is an apocalyptic number.

25545500 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 25545500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29374800).

25545500 is an abundant number, since it is smaller than the sum of its proper divisors (33204100).

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

25545500 is a wasteful number, since it uses less digits than its factorization.

25545500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 25545500 is about 5054.2556326328. The cubic root of 25545500 is about 294.5132257602.

The spelling of 25545500 in words is "twenty-five million, five hundred forty-five thousand, five hundred".