550218761 has 2 divisors, whose sum is σ = 550218762. Its totient is φ = 550218760.

The previous prime is 550218751. The next prime is 550218817. The reversal of 550218761 is 167812055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405257161 + 144961600 = 20131^2 + 12040^2 .

It is a cyclic number.

It is not a de Polignac number, because 550218761 - 2²⁶ = 483109897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550218751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275109380 + 275109381.

It is an arithmetic number, because the mean of its divisors is an integer number (275109381).

Almost surely, 2^550218761 is an apocalyptic number.

It is an amenable number.

550218761 is a deficient number, since it is larger than the sum of its proper divisors (1).

550218761 is an equidigital number, since it uses as much as digits as its factorization.

550218761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 550218761 is about 23456.7423356271. The cubic root of 550218761 is about 819.4298838020.

The spelling of 550218761 in words is "five hundred fifty million, two hundred eighteen thousand, seven hundred sixty-one".