513322321 has 4 divisors (see below), whose sum is σ = 517240944. Its totient is φ = 509403700.

The previous prime is 513322319. The next prime is 513322339. The reversal of 513322321 is 123223315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123223315 = 5 ⋅24644663.

It is a cyclic number.

It is not a de Polignac number, because 513322321 - 2¹ = 513322319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513322292 and 513322301.

It is not an unprimeable number, because it can be changed into a prime (513322421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959115 + ... + 1959376.

It is an arithmetic number, because the mean of its divisors is an integer number (129310236).

Almost surely, 2^513322321 is an apocalyptic number.

It is an amenable number.

513322321 is a deficient number, since it is larger than the sum of its proper divisors (3918623).

513322321 is a wasteful number, since it uses less digits than its factorization.

513322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918622.

The product of its digits is 1080, while the sum is 22.

The square root of 513322321 is about 22656.6175983972. The cubic root of 513322321 is about 800.6881168035.

Adding to 513322321 its reverse (123223315), we get a palindrome (636545636).

The spelling of 513322321 in words is "five hundred thirteen million, three hundred twenty-two thousand, three hundred twenty-one".