25550250 has 128 divisors (see below), whose sum is σ = 73681920. Its totient is φ = 5832000.

The previous prime is 25550243. The next prime is 25550267. The reversal of 25550250 is 5205552.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25550250.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156669 + ... + 156831.

It is an arithmetic number, because the mean of its divisors is an integer number (575640).

Almost surely, 2^25550250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25550250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36840960).

25550250 is an abundant number, since it is smaller than the sum of its proper divisors (48131670).

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

25550250 is a wasteful number, since it uses less digits than its factorization.

25550250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 25550250 is about 5054.7255118354. The cubic root of 25550250 is about 294.5314788266.

It can be divided in two parts, 255502 and 50, that added together give a palindrome (255552).

The spelling of 25550250 in words is "twenty-five million, five hundred fifty thousand, two hundred fifty".