15625116 has 96 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 4639680.

The previous prime is 15625109. The next prime is 15625117. The reversal of 15625116 is 61152651.

It is a happy number.

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 15625116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15625117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43345 + ... + 43703.

It is an arithmetic number, because the mean of its divisors is an integer number (470400).

Almost surely, 2^15625116 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 15625116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22579200).

15625116 is an abundant number, since it is smaller than the sum of its proper divisors (29533284).

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

15625116 is a wasteful number, since it uses less digits than its factorization.

15625116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 408 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 15625116 is about 3952.8617481516. The cubic root of 15625116 is about 250.0006186651. Note that the first 3 decimals are identical.

Adding to 15625116 its reverse (61152651), we get a palindrome (76777767).

The spelling of 15625116 in words is "fifteen million, six hundred twenty-five thousand, one hundred sixteen".