513103 has 2 divisors, whose sum is σ = 513104. Its totient is φ = 513102.

The previous prime is 513101. The next prime is 513109. The reversal of 513103 is 301315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513103 - 2¹ = 513101 is a prime.

Together with 513101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256551 + 256552.

It is an arithmetic number, because the mean of its divisors is an integer number (256552).

2⁵¹³¹⁰³ is an apocalyptic number.

513103 is a deficient number, since it is larger than the sum of its proper divisors (1).

513103 is an equidigital number, since it uses as much as digits as its factorization.

513103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 513103 is about 716.3120828242. The cubic root of 513103 is about 80.0574067127.

Adding to 513103 its reverse (301315), we get a palindrome (814418).

It can be divided in two parts, 513 and 103, that added together give a palindrome (616).

The spelling of 513103 in words is "five hundred thirteen thousand, one hundred three".