512045221 has 2 divisors, whose sum is σ = 512045222. Its totient is φ = 512045220.

The previous prime is 512045207. The next prime is 512045263. The reversal of 512045221 is 122540215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 461777121 + 50268100 = 21489^2 + 7090^2 .

It is a cyclic number.

It is not a de Polignac number, because 512045221 - 2⁵ = 512045189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 512045192 and 512045201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512045621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256022610 + 256022611.

It is an arithmetic number, because the mean of its divisors is an integer number (256022611).

Almost surely, 2^512045221 is an apocalyptic number.

It is an amenable number.

512045221 is a deficient number, since it is larger than the sum of its proper divisors (1).

512045221 is an equidigital number, since it uses as much as digits as its factorization.

512045221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 512045221 is about 22628.4162282737. The cubic root of 512045221 is about 800.0235519108.

Adding to 512045221 its reverse (122540215), we get a palindrome (634585436).

The spelling of 512045221 in words is "five hundred twelve million, forty-five thousand, two hundred twenty-one".