512044021 has 2 divisors, whose sum is σ = 512044022. Its totient is φ = 512044020.

The previous prime is 512043997. The next prime is 512044031. The reversal of 512044021 is 120440215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376903396 + 135140625 = 19414^2 + 11625^2 .

It is a cyclic number.

It is not a de Polignac number, because 512044021 - 2⁹ = 512043509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 512044021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512044031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256022010 + 256022011.

It is an arithmetic number, because the mean of its divisors is an integer number (256022011).

Almost surely, 2^512044021 is an apocalyptic number.

It is an amenable number.

512044021 is a deficient number, since it is larger than the sum of its proper divisors (1).

512044021 is an equidigital number, since it uses as much as digits as its factorization.

512044021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 512044021 is about 22628.3897129248. The cubic root of 512044021 is about 800.0229269471.

Adding to 512044021 its reverse (120440215), we get a palindrome (632484236).

It can be divided in two parts, 51204 and 4021, that added together give a square (55225 = 235²).

The spelling of 512044021 in words is "five hundred twelve million, forty-four thousand, twenty-one".