25010520 has 128 divisors (see below), whose sum is σ = 79453440. Its totient is φ = 6289920.

The previous prime is 25010509. The next prime is 25010537. The reversal of 25010520 is 2501052.

It is a super-2 number, since 2×25010520² = 1251052221340800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 25010520.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 190855 + ... + 190985.

It is an arithmetic number, because the mean of its divisors is an integer number (620730).

Almost surely, 2^25010520 is an apocalyptic number.

25010520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25010520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39726720).

25010520 is an abundant number, since it is smaller than the sum of its proper divisors (54442920).

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

25010520 is a wasteful number, since it uses less digits than its factorization.

25010520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 25010520 is about 5001.0518893529. The cubic root of 25010520 is about 292.4427822918.

Adding to 25010520 its reverse (2501052), we get a palindrome (27511572).

The spelling of 25010520 in words is "twenty-five million, ten thousand, five hundred twenty".