16052521 has 4 divisors (see below), whose sum is σ = 16394112. Its totient is φ = 15710932.

The previous prime is 16052503. The next prime is 16052537. The reversal of 16052521 is 12525061.

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 an emirpimes, since its reverse is a distinct semiprime: 12525061 = 563 ⋅22247.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16052521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16052492 and 16052501.

It is not an unprimeable number, because it can be changed into a prime (16052501) 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, 170725 + ... + 170818.

It is an arithmetic number, because the mean of its divisors is an integer number (4098528).

Almost surely, 2^16052521 is an apocalyptic number.

It is an amenable number.

16052521 is a deficient number, since it is larger than the sum of its proper divisors (341591).

16052521 is an equidigital number, since it uses as much as digits as its factorization.

16052521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341590.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 16052521 is about 4006.5597462162. The cubic root of 16052521 is about 252.2596268135.

Adding to 16052521 its reverse (12525061), we get a palindrome (28577582).

The spelling of 16052521 in words is "sixteen million, fifty-two thousand, five hundred twenty-one".