5204531221 has 2 divisors, whose sum is σ = 5204531222. Its totient is φ = 5204531220.

The previous prime is 5204531201. The next prime is 5204531251. The reversal of 5204531221 is 1221354025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3549180625 + 1655350596 = 59575^2 + 40686^2 .

It is a cyclic number.

It is not a de Polignac number, because 5204531221 - 2³¹ = 3057047573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5204531201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2602265610 + 2602265611.

It is an arithmetic number, because the mean of its divisors is an integer number (2602265611).

Almost surely, 2^5204531221 is an apocalyptic number.

It is an amenable number.

5204531221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5204531221 is an equidigital number, since it uses as much as digits as its factorization.

5204531221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 5204531221 is about 72142.4370325816. The cubic root of 5204531221 is about 1732.9812852042.

Adding to 5204531221 its reverse (1221354025), we get a palindrome (6425885246).

The spelling of 5204531221 in words is "five billion, two hundred four million, five hundred thirty-one thousand, two hundred twenty-one".