513043523 has 2 divisors, whose sum is σ = 513043524. Its totient is φ = 513043522.

The previous prime is 513043519. The next prime is 513043541. The reversal of 513043523 is 325340315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513043523 - 2² = 513043519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513043492 and 513043501.

It is not a weakly prime, because it can be changed into another prime (513043513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256521761 + 256521762.

It is an arithmetic number, because the mean of its divisors is an integer number (256521762).

Almost surely, 2^513043523 is an apocalyptic number.

513043523 is a deficient number, since it is larger than the sum of its proper divisors (1).

513043523 is an equidigital number, since it uses as much as digits as its factorization.

513043523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 513043523 is about 22650.4640791309. The cubic root of 513043523 is about 800.5431327376.

Adding to 513043523 its reverse (325340315), we get a palindrome (838383838).

The spelling of 513043523 in words is "five hundred thirteen million, forty-three thousand, five hundred twenty-three".