25210530 has 96 divisors (see below), whose sum is σ = 72109440. Its totient is φ = 6082560.

The previous prime is 25210519. The next prime is 25210547. The reversal of 25210530 is 3501252.

It is a happy number.

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

It is a Curzon 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, 39010 + ... + 39650.

It is an arithmetic number, because the mean of its divisors is an integer number (751140).

Almost surely, 2^25210530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25210530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36054720).

25210530 is an abundant number, since it is smaller than the sum of its proper divisors (46898910).

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

25210530 is a wasteful number, since it uses less digits than its factorization.

25210530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25210530 is about 5021.0088627685. The cubic root of 25210530 is about 293.2202717971.

Adding to 25210530 its reverse (3501252), we get a palindrome (28711782).

The spelling of 25210530 in words is "twenty-five million, two hundred ten thousand, five hundred thirty".