550255302781 has 2 divisors, whose sum is σ = 550255302782. Its totient is φ = 550255302780.

The previous prime is 550255302757. The next prime is 550255302787. The reversal of 550255302781 is 187203552055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324368977156 + 225886325625 = 569534^2 + 475275^2 .

It is a cyclic number.

It is not a de Polignac number, because 550255302781 - 2⁵ = 550255302749 is a prime.

It is a super-2 number, since 2×550255302781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550255302787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275127651390 + 275127651391.

It is an arithmetic number, because the mean of its divisors is an integer number (275127651391).

Almost surely, 2^550255302781 is an apocalyptic number.

It is an amenable number.

550255302781 is a deficient number, since it is larger than the sum of its proper divisors (1).

550255302781 is an equidigital number, since it uses as much as digits as its factorization.

550255302781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 550255302781 in words is "five hundred fifty billion, two hundred fifty-five million, three hundred two thousand, seven hundred eighty-one".