25218252 has 72 divisors (see below), whose sum is σ = 67092480. Its totient is φ = 7976160.

The previous prime is 25218233. The next prime is 25218269. The reversal of 25218252 is 25281252.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65653 + ... + 66035.

It is an arithmetic number, because the mean of its divisors is an integer number (931840).

Almost surely, 2^25218252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25218252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33546240).

25218252 is an abundant number, since it is smaller than the sum of its proper divisors (41874228).

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

25218252 is a wasteful number, since it uses less digits than its factorization.

25218252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 478 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 25218252 is about 5021.7777728609. Note that the first 5 decimals coincide. The cubic root of 25218252 is about 293.2502065875.

The spelling of 25218252 in words is "twenty-five million, two hundred eighteen thousand, two hundred fifty-two".