16522109 has 4 divisors (see below), whose sum is σ = 16530240. Its totient is φ = 16513980.

The previous prime is 16522087. The next prime is 16522117. The reversal of 16522109 is 90122561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16522109 - 2¹² = 16518013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16522409) 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, 1964 + ... + 6074.

It is an arithmetic number, because the mean of its divisors is an integer number (4132560).

Almost surely, 2^16522109 is an apocalyptic number.

It is an amenable number.

16522109 is a deficient number, since it is larger than the sum of its proper divisors (8131).

16522109 is an equidigital number, since it uses as much as digits as its factorization.

16522109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 16522109 is about 4064.7397210646. The cubic root of 16522109 is about 254.6958259589.

The spelling of 16522109 in words is "sixteen million, five hundred twenty-two thousand, one hundred nine".