575500021 has 2 divisors, whose sum is σ = 575500022. Its totient is φ = 575500020.

The previous prime is 575499979. The next prime is 575500049. The reversal of 575500021 is 120005575.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430562500 + 144937521 = 20750^2 + 12039^2 .

It is a cyclic number.

It is not a de Polignac number, because 575500021 - 2¹⁹ = 574975733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (575500061) 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, 287750010 + 287750011.

It is an arithmetic number, because the mean of its divisors is an integer number (287750011).

Almost surely, 2^575500021 is an apocalyptic number.

It is an amenable number.

575500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

575500021 is an equidigital number, since it uses as much as digits as its factorization.

575500021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 575500021 is about 23989.5815094803. The cubic root of 575500021 is about 831.7927192005.

Adding to 575500021 its reverse (120005575), we get a palindrome (695505596).

The spelling of 575500021 in words is "five hundred seventy-five million, five hundred thousand, twenty-one".