16515996 has 48 divisors (see below), whose sum is σ = 44518656. Its totient is φ = 4667904.

The previous prime is 16515973. The next prime is 16516009. The reversal of 16515996 is 69951561.

16515996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7135 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (927472).

Almost surely, 2^16515996 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 16515996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22259328).

16515996 is an abundant number, since it is smaller than the sum of its proper divisors (28002660).

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

16515996 is a wasteful number, since it uses less digits than its factorization.

16515996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 2136 counting only the distinct ones).

The product of its digits is 72900, while the sum is 42.

The square root of 16515996 is about 4063.9876968318. The cubic root of 16515996 is about 254.6644105255.

It can be divided in two parts, 165 and 15996, that added together give a palindrome (16161).

The spelling of 16515996 in words is "sixteen million, five hundred fifteen thousand, nine hundred ninety-six".