506030221 has 2 divisors, whose sum is σ = 506030222. Its totient is φ = 506030220.

The previous prime is 506030191. The next prime is 506030227. The reversal of 506030221 is 122030605.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293745321 + 212284900 = 17139^2 + 14570^2 .

It is a cyclic number.

It is not a de Polignac number, because 506030221 - 2²¹ = 503933069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506030227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253015110 + 253015111.

It is an arithmetic number, because the mean of its divisors is an integer number (253015111).

Almost surely, 2^506030221 is an apocalyptic number.

It is an amenable number.

506030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

506030221 is an equidigital number, since it uses as much as digits as its factorization.

506030221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 506030221 is about 22495.1154920352. The cubic root of 506030221 is about 796.8785768411.

Adding to 506030221 its reverse (122030605), we get a palindrome (628060826).

The spelling of 506030221 in words is "five hundred six million, thirty thousand, two hundred twenty-one".