25544500 has 48 divisors (see below), whose sum is σ = 57028608. Its totient is φ = 9991200.

The previous prime is 25544483. The next prime is 25544501. The reversal of 25544500 is 544552.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25544501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22957 + ... + 24043.

It is an arithmetic number, because the mean of its divisors is an integer number (1188096).

Almost surely, 2^25544500 is an apocalyptic number.

25544500 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 25544500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28514304).

25544500 is an abundant number, since it is smaller than the sum of its proper divisors (31484108).

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

25544500 is a wasteful number, since it uses less digits than its factorization.

25544500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 25544500 is about 5054.1567051290. The cubic root of 25544500 is about 294.5093827210.

The spelling of 25544500 in words is "twenty-five million, five hundred forty-four thousand, five hundred".