25215036 has 96 divisors (see below), whose sum is σ = 75962880. Its totient is φ = 6316800.

The previous prime is 25214999. The next prime is 25215049. The reversal of 25215036 is 63051252.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25214997 and 25215015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26326 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (791280).

Almost surely, 2^25215036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25215036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37981440).

25215036 is an abundant number, since it is smaller than the sum of its proper divisors (50747844).

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

25215036 is a wasteful number, since it uses less digits than its factorization.

25215036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25215036 is about 5021.4575573234. The cubic root of 25215036 is about 293.2377403157.

Adding to 25215036 its reverse (63051252), we get a palindrome (88266288).

It can be divided in two parts, 2521 and 5036, that added together give a palindrome (7557).

The spelling of 25215036 in words is "twenty-five million, two hundred fifteen thousand, thirty-six".