505541805 has 16 divisors (see below), whose sum is σ = 817957440. Its totient is φ = 266592128.

The previous prime is 505541791. The next prime is 505541807. The reversal of 505541805 is 508145505.

It is a cyclic number.

It is not a de Polignac number, because 505541805 - 2⁸ = 505541549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505541807) 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, 188007 + ... + 190676.

It is an arithmetic number, because the mean of its divisors is an integer number (51122340).

Almost surely, 2^505541805 is an apocalyptic number.

It is an amenable number.

505541805 is a deficient number, since it is larger than the sum of its proper divisors (312415635).

505541805 is a wasteful number, since it uses less digits than its factorization.

505541805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378780.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 505541805 is about 22484.2568256102. The cubic root of 505541805 is about 796.6221142043.

The spelling of 505541805 in words is "five hundred five million, five hundred forty-one thousand, eight hundred five".