513355343243 has 4 divisors (see below), whose sum is σ = 513357780408. Its totient is φ = 513352906080.

The previous prime is 513355343233. The next prime is 513355343257. The reversal of 513355343243 is 342343553315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513355343243 - 2³² = 509060375947 is a prime.

It is a super-2 number, since 2×513355343243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513355343243.

It is not an unprimeable number, because it can be changed into a prime (513355343233) 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, 869246 + ... + 1335027.

It is an arithmetic number, because the mean of its divisors is an integer number (128339445102).

Almost surely, 2^513355343243 is an apocalyptic number.

513355343243 is a deficient number, since it is larger than the sum of its proper divisors (2437165).

513355343243 is a wasteful number, since it uses less digits than its factorization.

513355343243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437164.

The product of its digits is 972000, while the sum is 41.

Adding to 513355343243 its reverse (342343553315), we get a palindrome (855698896558).

The spelling of 513355343243 in words is "five hundred thirteen billion, three hundred fifty-five million, three hundred forty-three thousand, two hundred forty-three".