513125323 has 2 divisors, whose sum is σ = 513125324. Its totient is φ = 513125322.

The previous prime is 513125269. The next prime is 513125359. The reversal of 513125323 is 323521315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513125323 is a prime.

It is not a weakly prime, because it can be changed into another prime (513125363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256562661 + 256562662.

It is an arithmetic number, because the mean of its divisors is an integer number (256562662).

Almost surely, 2^513125323 is an apocalyptic number.

513125323 is a deficient number, since it is larger than the sum of its proper divisors (1).

513125323 is an equidigital number, since it uses as much as digits as its factorization.

513125323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 513125323 is about 22652.2697096781. The cubic root of 513125323 is about 800.5856768528.

Adding to 513125323 its reverse (323521315), we get a palindrome (836646638).

The spelling of 513125323 in words is "five hundred thirteen million, one hundred twenty-five thousand, three hundred twenty-three".