52821001 has 4 divisors (see below), whose sum is σ = 52842132. Its totient is φ = 52799872.

The previous prime is 52820987. The next prime is 52821017. The reversal of 52821001 is 10012825.

52821001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 34339600 = 4299^2 + 5860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52821001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52821001.

It is not an unprimeable number, because it can be changed into a prime (52821061) 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, 6220 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (13210533).

Almost surely, 2^52821001 is an apocalyptic number.

It is an amenable number.

52821001 is a deficient number, since it is larger than the sum of its proper divisors (21131).

52821001 is a wasteful number, since it uses less digits than its factorization.

52821001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21130.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 52821001 is about 7267.8057899204. The cubic root of 52821001 is about 375.2052233722.

Adding to 52821001 its reverse (10012825), we get a palindrome (62833826).

The spelling of 52821001 in words is "fifty-two million, eight hundred twenty-one thousand, one".