549371811 has 4 divisors (see below), whose sum is σ = 732495752. Its totient is φ = 366247872.

The previous prime is 549371803. The next prime is 549371839. The reversal of 549371811 is 118173945.

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

It is not a de Polignac number, because 549371811 - 2³ = 549371803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549371811.

It is not an unprimeable number, because it can be changed into a prime (549371411) 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, 91561966 + ... + 91561971.

It is an arithmetic number, because the mean of its divisors is an integer number (183123938).

Almost surely, 2^549371811 is an apocalyptic number.

549371811 is a deficient number, since it is larger than the sum of its proper divisors (183123941).

549371811 is a wasteful number, since it uses less digits than its factorization.

549371811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183123940.

The product of its digits is 30240, while the sum is 39.

The square root of 549371811 is about 23438.6819381978. The cubic root of 549371811 is about 819.0092192754.

The spelling of 549371811 in words is "five hundred forty-nine million, three hundred seventy-one thousand, eight hundred eleven".