16530051 has 4 divisors (see below), whose sum is σ = 22040072. Its totient is φ = 11020032.

The previous prime is 16530049. The next prime is 16530067. The reversal of 16530051 is 15003561.

It is a happy number.

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

It is not a de Polignac number, because 16530051 - 2¹ = 16530049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16530071) 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, 2755006 + ... + 2755011.

It is an arithmetic number, because the mean of its divisors is an integer number (5510018).

Almost surely, 2^16530051 is an apocalyptic number.

16530051 is a deficient number, since it is larger than the sum of its proper divisors (5510021).

16530051 is an equidigital number, since it uses as much as digits as its factorization.

16530051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510020.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 16530051 is about 4065.7165420132. The cubic root of 16530051 is about 254.7366292693.

The spelling of 16530051 in words is "sixteen million, five hundred thirty thousand, fifty-one".