15951216 has 20 divisors (see below), whose sum is σ = 41207432. Its totient is φ = 5317056.

The previous prime is 15951211. The next prime is 15951217. The reversal of 15951216 is 61215951.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15951211) 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 3 ways as a sum of consecutive naturals, for example, 166111 + ... + 166206.

Almost surely, 2^15951216 is an apocalyptic number.

15951216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15951216 is an abundant number, since it is smaller than the sum of its proper divisors (25256216).

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

15951216 is a wasteful number, since it uses less digits than its factorization.

15951216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332328 (or 332322 counting only the distinct ones).

The product of its digits is 2700, while the sum is 30.

The square root of 15951216 is about 3993.8973446998. The cubic root of 15951216 is about 251.7278493022.

The spelling of 15951216 in words is "fifteen million, nine hundred fifty-one thousand, two hundred sixteen".