512201321 has 2 divisors, whose sum is σ = 512201322. Its totient is φ = 512201320.

The previous prime is 512201303. The next prime is 512201359. The reversal of 512201321 is 123102215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475719721 + 36481600 = 21811^2 + 6040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512201321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 512201321.

It is not a weakly prime, because it can be changed into another prime (512201021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256100660 + 256100661.

It is an arithmetic number, because the mean of its divisors is an integer number (256100661).

Almost surely, 2^512201321 is an apocalyptic number.

It is an amenable number.

512201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

512201321 is an equidigital number, since it uses as much as digits as its factorization.

512201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 512201321 is about 22631.8651683859. The cubic root of 512201321 is about 800.1048409474.

Adding to 512201321 its reverse (123102215), we get a palindrome (635303536).

The spelling of 512201321 in words is "five hundred twelve million, two hundred one thousand, three hundred twenty-one".