15825216 has 112 divisors (see below), whose sum is σ = 46817280. Its totient is φ = 4677120.

The previous prime is 15825209. The next prime is 15825239. The reversal of 15825216 is 61252851.

It is a super-2 number, since 2×15825216² = 500874922893312, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 124545 + ... + 124671.

Almost surely, 2^15825216 is an apocalyptic number.

15825216 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 15825216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23408640).

15825216 is an abundant number, since it is smaller than the sum of its proper divisors (30992064).

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

15825216 is a wasteful number, since it uses less digits than its factorization.

15825216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 15825216 is about 3978.0920049692. The cubic root of 15825216 is about 251.0632899135.

The spelling of 15825216 in words is "fifteen million, eight hundred twenty-five thousand, two hundred sixteen".