16053521 has 4 divisors (see below), whose sum is σ = 17512944. Its totient is φ = 14594100.

The previous prime is 16053497. The next prime is 16053539. The reversal of 16053521 is 12535061.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16053521 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 (16053551) 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, 729695 + ... + 729716.

It is an arithmetic number, because the mean of its divisors is an integer number (4378236).

Almost surely, 2^16053521 is an apocalyptic number.

16053521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16053521 is a deficient number, since it is larger than the sum of its proper divisors (1459423).

16053521 is a wasteful number, since it uses less digits than its factorization.

16053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459422.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 16053521 is about 4006.6845396163. The cubic root of 16053521 is about 252.2648649189.

Adding to 16053521 its reverse (12535061), we get a palindrome (28588582).

The spelling of 16053521 in words is "sixteen million, fifty-three thousand, five hundred twenty-one".