25516230 has 64 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 6491520.

The previous prime is 25516207. The next prime is 25516237. The reversal of 25516230 is 3261552.

It is a self number, because there is not a number n which added to its sum of digits gives 25516230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25516237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120825 + ... + 121035.

It is an arithmetic number, because the mean of its divisors is an integer number (1001700).

Almost surely, 2^25516230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25516230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32054400).

25516230 is an abundant number, since it is smaller than the sum of its proper divisors (38592570).

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

25516230 is a wasteful number, since it uses less digits than its factorization.

25516230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

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

The square root of 25516230 is about 5051.3592230211. The cubic root of 25516230 is about 294.4006984836.

Adding to 25516230 its reverse (3261552), we get a palindrome (28777782).

The spelling of 25516230 in words is "twenty-five million, five hundred sixteen thousand, two hundred thirty".