550217761 has 2 divisors, whose sum is σ = 550217762. Its totient is φ = 550217760.

The previous prime is 550217741. The next prime is 550217797. The reversal of 550217761 is 167712055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404774161 + 145443600 = 20119^2 + 12060^2 .

It is a cyclic number.

It is not a de Polignac number, because 550217761 - 2⁹ = 550217249 is a prime.

It is equal to p_28856230 and since 550217761 and 28856230 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (550217741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275108880 + 275108881.

It is an arithmetic number, because the mean of its divisors is an integer number (275108881).

Almost surely, 2^550217761 is an apocalyptic number.

It is an amenable number.

550217761 is a deficient number, since it is larger than the sum of its proper divisors (1).

550217761 is an equidigital number, since it uses as much as digits as its factorization.

550217761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 550217761 is about 23456.7210197845. The cubic root of 550217761 is about 819.4293873750.

The spelling of 550217761 in words is "five hundred fifty million, two hundred seventeen thousand, seven hundred sixty-one".