15765216 has 48 divisors (see below), whose sum is σ = 41835024. Its totient is φ = 5197824.

The previous prime is 15765203. The next prime is 15765223. The reversal of 15765216 is 61256751.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8466 + ... + 10158.

It is an arithmetic number, because the mean of its divisors is an integer number (871563).

Almost surely, 2^15765216 is an apocalyptic number.

15765216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15765216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20917512).

15765216 is an abundant number, since it is smaller than the sum of its proper divisors (26069808).

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

15765216 is a wasteful number, since it uses less digits than its factorization.

15765216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1795 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 15765216 is about 3970.5435396177. The cubic root of 15765216 is about 250.7455928215.

The spelling of 15765216 in words is "fifteen million, seven hundred sixty-five thousand, two hundred sixteen".