510140221 has 2 divisors, whose sum is σ = 510140222. Its totient is φ = 510140220.

The previous prime is 510140203. The next prime is 510140227. The reversal of 510140221 is 122041015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409860025 + 100280196 = 20245^2 + 10014^2 .

It is a cyclic number.

It is not a de Polignac number, because 510140221 - 2⁷ = 510140093 is a prime.

It is a super-3 number, since 3×510140221³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 510140195 and 510140204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (510140227) 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, 255070110 + 255070111.

It is an arithmetic number, because the mean of its divisors is an integer number (255070111).

Almost surely, 2^510140221 is an apocalyptic number.

It is an amenable number.

510140221 is a deficient number, since it is larger than the sum of its proper divisors (1).

510140221 is an equidigital number, since it uses as much as digits as its factorization.

510140221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 510140221 is about 22586.2839130300. The cubic root of 510140221 is about 799.0301899147.

Adding to 510140221 its reverse (122041015), we get a palindrome (632181236).

The spelling of 510140221 in words is "five hundred ten million, one hundred forty thousand, two hundred twenty-one".