16052821 has 8 divisors (see below), whose sum is σ = 16490264. Its totient is φ = 15621120.

The previous prime is 16052807. The next prime is 16052833. The reversal of 16052821 is 12825061.

It can be written as a sum of positive squares in 4 ways, for example, as 2436721 + 13616100 = 1561^2 + 3690^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16052821 - 2⁵ = 16052789 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 (16052851) 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, 4561 + ... + 7273.

It is an arithmetic number, because the mean of its divisors is an integer number (2061283).

Almost surely, 2^16052821 is an apocalyptic number.

It is an amenable number.

16052821 is a deficient number, since it is larger than the sum of its proper divisors (437443).

16052821 is an equidigital number, since it uses as much as digits as its factorization.

16052821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16052821 is about 4006.5971846443. The cubic root of 16052821 is about 252.2611982680.

Adding to 16052821 its reverse (12825061), we get a palindrome (28877882).

The spelling of 16052821 in words is "sixteen million, fifty-two thousand, eight hundred twenty-one".