506221919 has 4 divisors (see below), whose sum is σ = 578539344. Its totient is φ = 433904496.

The previous prime is 506221889. The next prime is 506221949. The reversal of 506221919 is 919122605.

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

It is an interprime number because it is at equal distance from previous prime (506221889) and next prime (506221949).

It is a cyclic number.

It is not a de Polignac number, because 506221919 - 2⁸ = 506221663 is a prime.

It is a super-2 number, since 2×506221919² = 512521262552085122, 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 (506221949) 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, 36158702 + ... + 36158715.

It is an arithmetic number, because the mean of its divisors is an integer number (144634836).

Almost surely, 2^506221919 is an apocalyptic number.

506221919 is a deficient number, since it is larger than the sum of its proper divisors (72317425).

506221919 is an equidigital number, since it uses as much as digits as its factorization.

506221919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72317424.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 506221919 is about 22499.3759691241. The cubic root of 506221919 is about 796.9791905576.

The spelling of 506221919 in words is "five hundred six million, two hundred twenty-one thousand, nine hundred nineteen".