16500881 has 8 divisors (see below), whose sum is σ = 16699200. Its totient is φ = 16304112.

The previous prime is 16500877. The next prime is 16500889. The reversal of 16500881 is 18800561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16500881 - 2² = 16500877 is a prime.

It is a super-2 number, since 2×16500881² = 544558147552322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16500889) 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 7 ways as a sum of consecutive naturals, for example, 56171 + ... + 56463.

It is an arithmetic number, because the mean of its divisors is an integer number (2087400).

Almost surely, 2^16500881 is an apocalyptic number.

It is an amenable number.

16500881 is a deficient number, since it is larger than the sum of its proper divisors (198319).

16500881 is a wasteful number, since it uses less digits than its factorization.

16500881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 16500881 is about 4062.1276444740. The cubic root of 16500881 is about 254.5866994506.

The spelling of 16500881 in words is "sixteen million, five hundred thousand, eight hundred eighty-one".