506521373 has 2 divisors, whose sum is σ = 506521374. Its totient is φ = 506521372.

The previous prime is 506521319. The next prime is 506521423. The reversal of 506521373 is 373125605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373764889 + 132756484 = 19333^2 + 11522^2 .

It is a cyclic number.

It is not a de Polignac number, because 506521373 - 2⁸ = 506521117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506521073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253260686 + 253260687.

It is an arithmetic number, because the mean of its divisors is an integer number (253260687).

Almost surely, 2^506521373 is an apocalyptic number.

It is an amenable number.

506521373 is a deficient number, since it is larger than the sum of its proper divisors (1).

506521373 is an equidigital number, since it uses as much as digits as its factorization.

506521373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 506521373 is about 22506.0297031707. The cubic root of 506521373 is about 797.1363097667.

Adding to 506521373 its reverse (373125605), we get a palindrome (879646978).

It can be divided in two parts, 50652 and 1373, that added together give a palindrome (52025).

The spelling of 506521373 in words is "five hundred six million, five hundred twenty-one thousand, three hundred seventy-three".