16530601 has 4 divisors (see below), whose sum is σ = 16977412. Its totient is φ = 16083792.

The previous prime is 16530581. The next prime is 16530607. The reversal of 16530601 is 10603561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7974976 + 8555625 = 2824^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 16530601 - 2¹¹ = 16528553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16530607) 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, 223350 + ... + 223423.

It is an arithmetic number, because the mean of its divisors is an integer number (4244353).

Almost surely, 2^16530601 is an apocalyptic number.

It is an amenable number.

16530601 is a deficient number, since it is larger than the sum of its proper divisors (446811).

16530601 is an equidigital number, since it uses as much as digits as its factorization.

16530601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446810.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 16530601 is about 4065.7841802044. The cubic root of 16530601 is about 254.7394544993.

The spelling of 16530601 in words is "sixteen million, five hundred thirty thousand, six hundred one".