505605501 has 6 divisors (see below), whose sum is σ = 730319070. Its totient is φ = 337070328.

The previous prime is 505605497. The next prime is 505605511. The reversal of 505605501 is 105506505.

505605501 is a `hidden beast` number, since 5 + 0 + 5 + 605 + 50 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 505575225 + 30276 = 22485^2 + 174^2 .

It is not a de Polignac number, because 505605501 - 2² = 505605497 is a prime.

It is a super-2 number, since 2×505605501² = 511273845282922002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505605511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28089186 + ... + 28089203.

It is an arithmetic number, because the mean of its divisors is an integer number (121719845).

Almost surely, 2^505605501 is an apocalyptic number.

It is an amenable number.

505605501 is a deficient number, since it is larger than the sum of its proper divisors (224713569).

505605501 is a wasteful number, since it uses less digits than its factorization.

505605501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56178395 (or 56178392 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 505605501 is about 22485.6732387536. The cubic root of 505605501 is about 796.6555697370.

The spelling of 505605501 in words is "five hundred five million, six hundred five thousand, five hundred one".