550206356321 has 2 divisors, whose sum is σ = 550206356322. Its totient is φ = 550206356320.

The previous prime is 550206356279. The next prime is 550206356351. The reversal of 550206356321 is 123653602055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283304965696 + 266901390625 = 532264^2 + 516625^2 .

It is a cyclic number.

It is not a de Polignac number, because 550206356321 - 2¹⁰ = 550206355297 is a prime.

It is not a weakly prime, because it can be changed into another prime (550206356351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275103178160 + 275103178161.

It is an arithmetic number, because the mean of its divisors is an integer number (275103178161).

Almost surely, 2^550206356321 is an apocalyptic number.

It is an amenable number.

550206356321 is a deficient number, since it is larger than the sum of its proper divisors (1).

550206356321 is an equidigital number, since it uses as much as digits as its factorization.

550206356321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 550206356321 its reverse (123653602055), we get a palindrome (673859958376).

The spelling of 550206356321 in words is "five hundred fifty billion, two hundred six million, three hundred fifty-six thousand, three hundred twenty-one".