506331505 has 4 divisors (see below), whose sum is σ = 607597812. Its totient is φ = 405065200.

The previous prime is 506331479. The next prime is 506331523. The reversal of 506331505 is 505133605.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 323568144 + 182763361 = 17988^2 + 13519^2 .

It is not a de Polignac number, because 506331505 - 2¹⁷ = 506200433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50633146 + ... + 50633155.

It is an arithmetic number, because the mean of its divisors is an integer number (151899453).

Almost surely, 2^506331505 is an apocalyptic number.

It is an amenable number.

506331505 is a deficient number, since it is larger than the sum of its proper divisors (101266307).

506331505 is a wasteful number, since it uses less digits than its factorization.

506331505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101266306.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 506331505 is about 22501.8111493275. The cubic root of 506331505 is about 797.0366959433.

The spelling of 506331505 in words is "five hundred six million, three hundred thirty-one thousand, five hundred five".