25216500 has 48 divisors (see below), whose sum is σ = 73434816. Its totient is φ = 6724000.

The previous prime is 25216493. The next prime is 25216507. The reversal of 25216500 is 561252.

It is an interprime number because it is at equal distance from previous prime (25216493) and next prime (25216507).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216507) 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 15 ways as a sum of consecutive naturals, for example, 6906 + ... + 9905.

It is an arithmetic number, because the mean of its divisors is an integer number (1529892).

Almost surely, 2^25216500 is an apocalyptic number.

25216500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25216500 is an abundant number, since it is smaller than the sum of its proper divisors (48218316).

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

25216500 is a wasteful number, since it uses less digits than its factorization.

25216500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16833 (or 16821 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 25216500 is about 5021.6033296150. The cubic root of 25216500 is about 293.2434153918.

Adding to 25216500 its reverse (561252), we get a palindrome (25777752).

The spelling of 25216500 in words is "twenty-five million, two hundred sixteen thousand, five hundred".