513131303 has 2 divisors, whose sum is σ = 513131304. Its totient is φ = 513131302.

The previous prime is 513131291. The next prime is 513131317. The reversal of 513131303 is 303131315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513131303 - 2⁴ = 513131287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513131393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256565651 + 256565652.

It is an arithmetic number, because the mean of its divisors is an integer number (256565652).

Almost surely, 2^513131303 is an apocalyptic number.

513131303 is a deficient number, since it is larger than the sum of its proper divisors (1).

513131303 is an equidigital number, since it uses as much as digits as its factorization.

513131303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 513131303 is about 22652.4017048965. The cubic root of 513131303 is about 800.5887868687.

Adding to 513131303 its reverse (303131315), we get a palindrome (816262618).

The spelling of 513131303 in words is "five hundred thirteen million, one hundred thirty-one thousand, three hundred three".