25250550 has 96 divisors (see below), whose sum is σ = 70495488. Its totient is φ = 5934720.

The previous prime is 25250543. The next prime is 25250579. The reversal of 25250550 is 5505252.

It is a self number, because there is not a number n which added to its sum of digits gives 25250550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44569 + ... + 45131.

It is an arithmetic number, because the mean of its divisors is an integer number (734328).

Almost surely, 2^25250550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25250550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35247744).

25250550 is an abundant number, since it is smaller than the sum of its proper divisors (45244938).

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

25250550 is a wasteful number, since it uses less digits than its factorization.

25250550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 609 counting only the distinct ones).

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

The square root of 25250550 is about 5024.9925373079. The cubic root of 25250550 is about 293.3753455092.

The spelling of 25250550 in words is "twenty-five million, two hundred fifty thousand, five hundred fifty".