52104221 has 6 divisors (see below), whose sum is σ = 56420730. Its totient is φ = 48096048.

The previous prime is 52104193. The next prime is 52104233. The reversal of 52104221 is 12240125.

It can be written as a sum of positive squares in 3 ways, for example, as 4687225 + 47416996 = 2165^2 + 6886^2 .

It is not a de Polignac number, because 52104221 - 2¹⁴ = 52087837 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 52104221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52104421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153986 + ... + 154323.

It is an arithmetic number, because the mean of its divisors is an integer number (9403455).

Almost surely, 2^52104221 is an apocalyptic number.

It is an amenable number.

52104221 is a deficient number, since it is larger than the sum of its proper divisors (4316509).

52104221 is a wasteful number, since it uses less digits than its factorization.

52104221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308335 (or 308322 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 52104221 is about 7218.3253598047. The cubic root of 52104221 is about 373.5003121213.

Adding to 52104221 its reverse (12240125), we get a palindrome (64344346).

It can be divided in two parts, 52104 and 221, that added together give a palindrome (52325).

The spelling of 52104221 in words is "fifty-two million, one hundred four thousand, two hundred twenty-one".