512643361 has 4 divisors (see below), whose sum is σ = 512718724. Its totient is φ = 512568000.

The previous prime is 512643277. The next prime is 512643379. The reversal of 512643361 is 163346215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183765136 + 328878225 = 13556^2 + 18135^2 .

It is a cyclic number.

It is not a de Polignac number, because 512643361 - 2⁷ = 512643233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512643661) 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 in 3 ways as a sum of consecutive naturals, for example, 26340 + ... + 41461.

It is an arithmetic number, because the mean of its divisors is an integer number (128179681).

Almost surely, 2^512643361 is an apocalyptic number.

It is an amenable number.

512643361 is a deficient number, since it is larger than the sum of its proper divisors (75363).

512643361 is an equidigital number, since it uses as much as digits as its factorization.

512643361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75362.

The product of its digits is 12960, while the sum is 31.

The square root of 512643361 is about 22641.6289387491. The cubic root of 512643361 is about 800.3349436006.

Adding to 512643361 its reverse (163346215), we get a palindrome (675989576).

The spelling of 512643361 in words is "five hundred twelve million, six hundred forty-three thousand, three hundred sixty-one".