16500001 has 8 divisors (see below), whose sum is σ = 18974144. Its totient is φ = 14055120.

The previous prime is 16499963. The next prime is 16500007. The reversal of 16500001 is 10000561.

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 16500001 - 2⁹ = 16499489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16500007) 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, 6090 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (2371768).

Almost surely, 2^16500001 is an apocalyptic number.

It is an amenable number.

16500001 is a deficient number, since it is larger than the sum of its proper divisors (2474143).

16500001 is a wasteful number, since it uses less digits than its factorization.

16500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 16500001 is about 4062.0193254095. The cubic root of 16500001 is about 254.5821736260.

Adding to 16500001 its reverse (10000561), we get a palindrome (26500562).

The spelling of 16500001 in words is "sixteen million, five hundred thousand, one".