513322421 has 2 divisors, whose sum is σ = 513322422. Its totient is φ = 513322420.

The previous prime is 513322409. The next prime is 513322427. The reversal of 513322421 is 124223315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330694225 + 182628196 = 18185^2 + 13514^2 .

It is a cyclic number.

It is not a de Polignac number, because 513322421 - 2⁶ = 513322357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513322427) 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, 256661210 + 256661211.

It is an arithmetic number, because the mean of its divisors is an integer number (256661211).

Almost surely, 2^513322421 is an apocalyptic number.

It is an amenable number.

513322421 is a deficient number, since it is larger than the sum of its proper divisors (1).

513322421 is an equidigital number, since it uses as much as digits as its factorization.

513322421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 513322421 is about 22656.6198052578. The cubic root of 513322421 is about 800.6881687974.

Adding to 513322421 its reverse (124223315), we get a palindrome (637545736).

The spelling of 513322421 in words is "five hundred thirteen million, three hundred twenty-two thousand, four hundred twenty-one".