550218905 has 4 divisors (see below), whose sum is σ = 660262692. Its totient is φ = 440175120.

The previous prime is 550218901. The next prime is 550218913. The reversal of 550218905 is 509812055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193877776 + 356341129 = 13924^2 + 18877^2 .

It is not a de Polignac number, because 550218905 - 2² = 550218901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550218901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55021886 + ... + 55021895.

It is an arithmetic number, because the mean of its divisors is an integer number (165065673).

Almost surely, 2^550218905 is an apocalyptic number.

It is an amenable number.

550218905 is a deficient number, since it is larger than the sum of its proper divisors (110043787).

550218905 is a wasteful number, since it uses less digits than its factorization.

550218905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110043786.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 550218905 is about 23456.7454051068. The cubic root of 550218905 is about 819.4299552874.

The spelling of 550218905 in words is "five hundred fifty million, two hundred eighteen thousand, nine hundred five".