506222509 has 4 divisors (see below), whose sum is σ = 545162716. Its totient is φ = 467282304.

The previous prime is 506222501. The next prime is 506222513. The reversal of 506222509 is 905222605.

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 27269284 + 478953225 = 5222^2 + 21885^2 .

It is a cyclic number.

It is not a de Polignac number, because 506222509 - 2³ = 506222501 is a prime.

It is a super-2 number, since 2×506222509² = 512522457236510162, 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 (506222501) 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 3 ways as a sum of consecutive naturals, for example, 19470084 + ... + 19470109.

It is an arithmetic number, because the mean of its divisors is an integer number (136290679).

Almost surely, 2^506222509 is an apocalyptic number.

It is an amenable number.

506222509 is a deficient number, since it is larger than the sum of its proper divisors (38940207).

506222509 is a wasteful number, since it uses less digits than its factorization.

506222509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38940206.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 506222509 is about 22499.3890805951. The cubic root of 506222509 is about 796.9795001830.

The spelling of 506222509 in words is "five hundred six million, two hundred twenty-two thousand, five hundred nine".