550221351509 has 2 divisors, whose sum is σ = 550221351510. Its totient is φ = 550221351508.

The previous prime is 550221351503. The next prime is 550221351541. The reversal of 550221351509 is 905153122055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513376549009 + 36844802500 = 716503^2 + 191950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550221351509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550221351503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275110675754 + 275110675755.

It is an arithmetic number, because the mean of its divisors is an integer number (275110675755).

Almost surely, 2^550221351509 is an apocalyptic number.

It is an amenable number.

550221351509 is a deficient number, since it is larger than the sum of its proper divisors (1).

550221351509 is an equidigital number, since it uses as much as digits as its factorization.

550221351509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 550221351509 in words is "five hundred fifty billion, two hundred twenty-one million, three hundred fifty-one thousand, five hundred nine".