25218000 has 160 divisors (see below), whose sum is σ = 90529920. Its totient is φ = 6710400.

The previous prime is 25217989. The next prime is 25218013. The reversal of 25218000 is 81252.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53767 + ... + 54233.

It is an arithmetic number, because the mean of its divisors is an integer number (565812).

Almost surely, 2^25218000 is an apocalyptic number.

25218000 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 25218000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45264960).

25218000 is an abundant number, since it is smaller than the sum of its proper divisors (65311920).

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

25218000 is a wasteful number, since it uses less digits than its factorization.

25218000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 25218000 is about 5021.7526820822. The cubic root of 25218000 is about 293.2492297911.

Adding to 25218000 its reverse (81252), we get a palindrome (25299252).

The spelling of 25218000 in words is "twenty-five million, two hundred eighteen thousand".