16521334 has 4 divisors (see below), whose sum is σ = 24782004. Its totient is φ = 8260666.

The previous prime is 16521293. The next prime is 16521341. The reversal of 16521334 is 43312561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43312561 = 113 ⋅383297.

It is a junction number, because it is equal to n+sod(n) for n = 16521299 and 16521308.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4130332 + ... + 4130335.

It is an arithmetic number, because the mean of its divisors is an integer number (6195501).

Almost surely, 2^16521334 is an apocalyptic number.

16521334 is a deficient number, since it is larger than the sum of its proper divisors (8260670).

16521334 is an equidigital number, since it uses as much as digits as its factorization.

16521334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260669.

The product of its digits is 2160, while the sum is 25.

The square root of 16521334 is about 4064.6443878893. The cubic root of 16521334 is about 254.6918435708.

Adding to 16521334 its reverse (43312561), we get a palindrome (59833895).

The spelling of 16521334 in words is "sixteen million, five hundred twenty-one thousand, three hundred thirty-four".