5520456421 has 2 divisors, whose sum is σ = 5520456422. Its totient is φ = 5520456420.

The previous prime is 5520456419. The next prime is 5520456437. The reversal of 5520456421 is 1246540255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4280430625 + 1240025796 = 65425^2 + 35214^2 .

It is a cyclic number.

It is not a de Polignac number, because 5520456421 - 2¹ = 5520456419 is a prime.

Together with 5520456419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5520450421) 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 as a sum of consecutive naturals, namely, 2760228210 + 2760228211.

It is an arithmetic number, because the mean of its divisors is an integer number (2760228211).

Almost surely, 2^5520456421 is an apocalyptic number.

It is an amenable number.

5520456421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5520456421 is an equidigital number, since it uses as much as digits as its factorization.

5520456421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 5520456421 is about 74299.7740306120. The cubic root of 5520456421 is about 1767.3598931587.

Adding to 5520456421 its reverse (1246540255), we get a palindrome (6766996676).

The spelling of 5520456421 in words is "five billion, five hundred twenty million, four hundred fifty-six thousand, four hundred twenty-one".