513213343 has 4 divisors (see below), whose sum is σ = 517755168. Its totient is φ = 508671520.

The previous prime is 513213317. The next prime is 513213353. The reversal of 513213343 is 343312315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343312315 = 5 ⋅68662463.

It is a cyclic number.

It is not a de Polignac number, because 513213343 - 2²⁵ = 479658911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513213353) 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 in 3 ways as a sum of consecutive naturals, for example, 2270743 + ... + 2270968.

It is an arithmetic number, because the mean of its divisors is an integer number (129438792).

Almost surely, 2^513213343 is an apocalyptic number.

513213343 is a deficient number, since it is larger than the sum of its proper divisors (4541825).

513213343 is a wasteful number, since it uses less digits than its factorization.

513213343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541824.

The product of its digits is 3240, while the sum is 25.

The square root of 513213343 is about 22654.2124780360. The cubic root of 513213343 is about 800.6314509352.

Adding to 513213343 its reverse (343312315), we get a palindrome (856525658).

The spelling of 513213343 in words is "five hundred thirteen million, two hundred thirteen thousand, three hundred forty-three".