549312865 has 4 divisors (see below), whose sum is σ = 659175444. Its totient is φ = 439450288.

The previous prime is 549312853. The next prime is 549312913. The reversal of 549312865 is 568213945.

549312865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 267878689 + 281434176 = 16367^2 + 16776^2 .

It is a cyclic number.

It is not a de Polignac number, because 549312865 - 2¹³ = 549304673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54931282 + ... + 54931291.

It is an arithmetic number, because the mean of its divisors is an integer number (164793861).

Almost surely, 2^549312865 is an apocalyptic number.

It is an amenable number.

549312865 is a deficient number, since it is larger than the sum of its proper divisors (109862579).

549312865 is a wasteful number, since it uses less digits than its factorization.

549312865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109862578.

The product of its digits is 259200, while the sum is 43.

The square root of 549312865 is about 23437.4244532116. The cubic root of 549312865 is about 818.9799257907.

The spelling of 549312865 in words is "five hundred forty-nine million, three hundred twelve thousand, eight hundred sixty-five".