505530511 has 4 divisors (see below), whose sum is σ = 532137400. Its totient is φ = 478923624.

The previous prime is 505530503. The next prime is 505530527. The reversal of 505530511 is 115035505.

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

It is a cyclic number.

It is not a de Polignac number, because 505530511 - 2³ = 505530503 is a prime.

It is a super-2 number, since 2×505530511² = 511122195103842242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505530551) 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, 13303416 + ... + 13303453.

It is an arithmetic number, because the mean of its divisors is an integer number (133034350).

Almost surely, 2^505530511 is an apocalyptic number.

505530511 is a deficient number, since it is larger than the sum of its proper divisors (26606889).

505530511 is a wasteful number, since it uses less digits than its factorization.

505530511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26606888.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 505530511 is about 22484.0056706984. The cubic root of 505530511 is about 796.6161818777.

The spelling of 505530511 in words is "five hundred five million, five hundred thirty thousand, five hundred eleven".