506531213 has 2 divisors, whose sum is σ = 506531214. Its totient is φ = 506531212.

The previous prime is 506531171. The next prime is 506531257. The reversal of 506531213 is 312135605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479522404 + 27008809 = 21898^2 + 5197^2 .

It is a cyclic number.

It is not a de Polignac number, because 506531213 - 2¹⁴ = 506514829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253265606 + 253265607.

It is an arithmetic number, because the mean of its divisors is an integer number (253265607).

Almost surely, 2^506531213 is an apocalyptic number.

It is an amenable number.

506531213 is a deficient number, since it is larger than the sum of its proper divisors (1).

506531213 is an equidigital number, since it uses as much as digits as its factorization.

506531213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 506531213 is about 22506.2483101916. The cubic root of 506531213 is about 797.1414716223.

Adding to 506531213 its reverse (312135605), we get a palindrome (818666818).

The spelling of 506531213 in words is "five hundred six million, five hundred thirty-one thousand, two hundred thirteen".