506055591 has 24 divisors (see below), whose sum is σ = 767370240. Its totient is φ = 320747856.

The previous prime is 506055559. The next prime is 506055601. The reversal of 506055591 is 195550605.

506055591 is a `hidden beast` number, since 5 + 0 + 60 + 5 + 5 + 591 = 666.

It is not a de Polignac number, because 506055591 - 2⁵ = 506055559 is a prime.

It is a super-2 number, since 2×506055591² = 512184522364718562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506055391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27250 + ... + 41888.

It is an arithmetic number, because the mean of its divisors is an integer number (31973760).

Almost surely, 2^506055591 is an apocalyptic number.

506055591 is a deficient number, since it is larger than the sum of its proper divisors (261314649).

506055591 is a wasteful number, since it uses less digits than its factorization.

506055591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14835 (or 14832 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 506055591 is about 22495.6793851619. The cubic root of 506055591 is about 796.8918938794.

The spelling of 506055591 in words is "five hundred six million, fifty-five thousand, five hundred ninety-one".