25623216 has 100 divisors (see below), whose sum is σ = 78590952. Its totient is φ = 8031744.

The previous prime is 25623197. The next prime is 25623217. The reversal of 25623216 is 61232652.

25623216 is a `hidden beast` number, since 25 + 623 + 2 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25623216.

It is not an unprimeable number, because it can be changed into a prime (25623217) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 21451 + ... + 22613.

Almost surely, 2^25623216 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 25623216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39295476).

25623216 is an abundant number, since it is smaller than the sum of its proper divisors (52967736).

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

25623216 is a wasteful number, since it uses less digits than its factorization.

25623216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200 (or 1185 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 25623216 is about 5061.9379688021. The cubic root of 25623216 is about 294.8115851347.

Adding to 25623216 its reverse (61232652), we get a palindrome (86855868).

It can be divided in two parts, 2562 and 3216, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 25623216 in words is "twenty-five million, six hundred twenty-three thousand, two hundred sixteen".