5204403521 has 2 divisors, whose sum is σ = 5204403522. Its totient is φ = 5204403520.

The previous prime is 5204403509. The next prime is 5204403541. The reversal of 5204403521 is 1253044025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5203602496 + 801025 = 72136^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 5204403521 - 2¹⁸ = 5204141377 is a prime.

It is not a weakly prime, because it can be changed into another prime (5204403541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2602201760 + 2602201761.

It is an arithmetic number, because the mean of its divisors is an integer number (2602201761).

Almost surely, 2^5204403521 is an apocalyptic number.

It is an amenable number.

5204403521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5204403521 is an equidigital number, since it uses as much as digits as its factorization.

5204403521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 5204403521 is about 72141.5519724936. The cubic root of 5204403521 is about 1732.9671114320.

Adding to 5204403521 its reverse (1253044025), we get a palindrome (6457447546).

The spelling of 5204403521 in words is "five billion, two hundred four million, four hundred three thousand, five hundred twenty-one".