5204021621 has 8 divisors (see below), whose sum is σ = 5347130784. Its totient is φ = 5061042000.

The previous prime is 5204021597. The next prime is 5204021633. The reversal of 5204021621 is 1261204025.

It is a happy number.

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 5204021621 - 2²⁶ = 5136912757 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 (5204021671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52046 + ... + 114528.

It is an arithmetic number, because the mean of its divisors is an integer number (668391348).

Almost surely, 2^5204021621 is an apocalyptic number.

It is an amenable number.

5204021621 is a deficient number, since it is larger than the sum of its proper divisors (143109163).

5204021621 is a wasteful number, since it uses less digits than its factorization.

5204021621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64771.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 5204021621 is about 72138.9050443656. The cubic root of 5204021621 is about 1732.9247219231.

Adding to 5204021621 its reverse (1261204025), we get a palindrome (6465225646).

The spelling of 5204021621 in words is "five billion, two hundred four million, twenty-one thousand, six hundred twenty-one".