513455305031323 has 2 divisors, whose sum is σ = 513455305031324. Its totient is φ = 513455305031322.

The previous prime is 513455305031267. The next prime is 513455305031351. The reversal of 513455305031323 is 323130503554315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513455305031323 is a prime.

It is a super-2 number, since 2×513455305031323² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513455305031323.

It is not a weakly prime, because it can be changed into another prime (513455335031323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256727652515661 + 256727652515662.

It is an arithmetic number, because the mean of its divisors is an integer number (256727652515662).

Almost surely, 2^{513455305031323} is an apocalyptic number.

513455305031323 is a deficient number, since it is larger than the sum of its proper divisors (1).

513455305031323 is an equidigital number, since it uses as much as digits as its factorization.

513455305031323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215000, while the sum is 43.

Adding to 513455305031323 its reverse (323130503554315), we get a palindrome (836585808585638).

The spelling of 513455305031323 in words is "five hundred thirteen trillion, four hundred fifty-five billion, three hundred five million, thirty-one thousand, three hundred twenty-three".