25501050 has 72 divisors (see below), whose sum is σ = 69710940. Its totient is φ = 6681600.

The previous prime is 25501033. The next prime is 25501051. The reversal of 25501050 is 5010552.

It can be written as a sum of positive squares in 6 ways, for example, as 8649 + 25492401 = 93^2 + 5049^2 .

It is a super-2 number, since 2×25501050² = 1300607102205000, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25501051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26986 + ... + 27914.

Almost surely, 2^25501050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25501050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34855470).

25501050 is an abundant number, since it is smaller than the sum of its proper divisors (44209890).

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

25501050 is a wasteful number, since it uses less digits than its factorization.

25501050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 25501050 is about 5049.8564336028. The cubic root of 25501050 is about 294.3423057257.

It can be divided in two parts, 2550 and 1050, that added together give a square (3600 = 60²).

The spelling of 25501050 in words is "twenty-five million, five hundred one thousand, fifty".