505541811 has 16 divisors (see below), whose sum is σ = 679326624. Its totient is φ = 334401024.

The previous prime is 505541807. The next prime is 505541821. The reversal of 505541811 is 118145505.

It is not a de Polignac number, because 505541811 - 2² = 505541807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505541821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506565 + ... + 507561.

It is an arithmetic number, because the mean of its divisors is an integer number (42457914).

Almost surely, 2^505541811 is an apocalyptic number.

505541811 is a deficient number, since it is larger than the sum of its proper divisors (173784813).

505541811 is a wasteful number, since it uses less digits than its factorization.

505541811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150.

The product of its (nonzero) digits is 4000, while the sum is 30.

The square root of 505541811 is about 22484.2569590369. The cubic root of 505541811 is about 796.6221173558.

The spelling of 505541811 in words is "five hundred five million, five hundred forty-one thousand, eight hundred eleven".