16521113 has 8 divisors (see below), whose sum is σ = 18906240. Its totient is φ = 14142240.

The previous prime is 16521103. The next prime is 16521133. The reversal of 16521113 is 31112561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16521113 - 2¹⁴ = 16504729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16521103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8108 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (2363280).

Almost surely, 2^16521113 is an apocalyptic number.

It is an amenable number.

16521113 is a deficient number, since it is larger than the sum of its proper divisors (2385127).

16521113 is a wasteful number, since it uses less digits than its factorization.

16521113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127.

The product of its digits is 180, while the sum is 20.

The square root of 16521113 is about 4064.6172021483. The cubic root of 16521113 is about 254.6907079250.

Adding to 16521113 its reverse (31112561), we get a palindrome (47633674).

The spelling of 16521113 in words is "sixteen million, five hundred twenty-one thousand, one hundred thirteen".