506221011 has 6 divisors (see below), whose sum is σ = 731208140. Its totient is φ = 337480668.

The previous prime is 506220977. The next prime is 506221021. The reversal of 506221011 is 110122605.

It is not a de Polignac number, because 506221011 - 2⁶ = 506220947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506221021) 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, 28123381 + ... + 28123398.

Almost surely, 2^506221011 is an apocalyptic number.

506221011 is a deficient number, since it is larger than the sum of its proper divisors (224987129).

506221011 is a wasteful number, since it uses less digits than its factorization.

506221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56246785 (or 56246782 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 506221011 is about 22499.3557907777. The cubic root of 506221011 is about 796.9787140488.

Adding to 506221011 its reverse (110122605), we get a palindrome (616343616).

The spelling of 506221011 in words is "five hundred six million, two hundred twenty-one thousand, eleven".