16321499 has 4 divisors (see below), whose sum is σ = 16483200. Its totient is φ = 16159800.

The previous prime is 16321493. The next prime is 16321507. The reversal of 16321499 is 99412361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16321499 - 2²⁰ = 15272923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16321493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80699 + ... + 80900.

It is an arithmetic number, because the mean of its divisors is an integer number (4120800).

Almost surely, 2^16321499 is an apocalyptic number.

16321499 is a deficient number, since it is larger than the sum of its proper divisors (161701).

16321499 is a wasteful number, since it uses less digits than its factorization.

16321499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161700.

The product of its digits is 11664, while the sum is 35.

The square root of 16321499 is about 4039.9874999807. The cubic root of 16321499 is about 253.6607940293.

The spelling of 16321499 in words is "sixteen million, three hundred twenty-one thousand, four hundred ninety-nine".