505530801 has 20 divisors (see below), whose sum is σ = 769430772. Its totient is φ = 330658848.

The previous prime is 505530791. The next prime is 505530827. The reversal of 505530801 is 108035505.

505530801 is a `hidden beast` number, since 50 + 5 + 530 + 80 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 134583201 + 370947600 = 11601^2 + 19260^2 .

It is not a de Polignac number, because 505530801 - 2¹³ = 505522609 is a prime.

It is a super-2 number, since 2×505530801² = 511122781519403202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (505530881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54586 + ... + 63171.

Almost surely, 2^505530801 is an apocalyptic number.

It is an amenable number.

505530801 is a deficient number, since it is larger than the sum of its proper divisors (263899971).

505530801 is a wasteful number, since it uses less digits than its factorization.

505530801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117822 (or 117813 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 505530801 is about 22484.0121197263. The cubic root of 505530801 is about 796.6163342053.

The spelling of 505530801 in words is "five hundred five million, five hundred thirty thousand, eight hundred one".