5521493221 has 2 divisors, whose sum is σ = 5521493222. Its totient is φ = 5521493220.

The previous prime is 5521493191. The next prime is 5521493269. The reversal of 5521493221 is 1223941255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2941869121 + 2579624100 = 54239^2 + 50790^2 .

It is a cyclic number.

It is not a de Polignac number, because 5521493221 - 2⁷ = 5521493093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5521493521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2760746610 + 2760746611.

It is an arithmetic number, because the mean of its divisors is an integer number (2760746611).

Almost surely, 2^5521493221 is an apocalyptic number.

It is an amenable number.

5521493221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5521493221 is an equidigital number, since it uses as much as digits as its factorization.

5521493221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 5521493221 is about 74306.7508440518. The cubic root of 5521493221 is about 1767.4705291819.

The spelling of 5521493221 in words is "five billion, five hundred twenty-one million, four hundred ninety-three thousand, two hundred twenty-one".