321412513 has 2 divisors, whose sum is σ = 321412514. Its totient is φ = 321412512.

The previous prime is 321412499. The next prime is 321412517. The reversal of 321412513 is 315214123.

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., 189805729 + 131606784 = 13777^2 + 11472^2 .

It is a cyclic number.

It is not a de Polignac number, because 321412513 - 2²¹ = 319315361 is a prime.

It is not a weakly prime, because it can be changed into another prime (321412517) 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 as a sum of consecutive naturals, namely, 160706256 + 160706257.

It is an arithmetic number, because the mean of its divisors is an integer number (160706257).

Almost surely, 2^321412513 is an apocalyptic number.

It is an amenable number.

321412513 is a deficient number, since it is larger than the sum of its proper divisors (1).

321412513 is an equidigital number, since it uses as much as digits as its factorization.

321412513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 321412513 is about 17927.9812862464. The cubic root of 321412513 is about 684.9953028609.

Adding to 321412513 its reverse (315214123), we get a palindrome (636626636).

The spelling of 321412513 in words is "three hundred twenty-one million, four hundred twelve thousand, five hundred thirteen".