513311403 has 12 divisors (see below), whose sum is σ = 752291624. Its totient is φ = 311097600.

The previous prime is 513311389. The next prime is 513311441. The reversal of 513311403 is 304113315.

It is not a de Polignac number, because 513311403 - 2⁹ = 513310891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513311403.

It is not an unprimeable number, because it can be changed into a prime (513311473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 706678 + ... + 707403.

Almost surely, 2^513311403 is an apocalyptic number.

513311403 is a deficient number, since it is larger than the sum of its proper divisors (238980221).

513311403 is a wasteful number, since it uses less digits than its factorization.

513311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414106 (or 1414095 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 513311403 is about 22656.3766520598. The cubic root of 513311403 is about 800.6824400747.

Adding to 513311403 its reverse (304113315), we get a palindrome (817424718).

The spelling of 513311403 in words is "five hundred thirteen million, three hundred eleven thousand, four hundred three".