513500403 has 16 divisors (see below), whose sum is σ = 776142080. Its totient is φ = 299368224.

The previous prime is 513500357. The next prime is 513500413. The reversal of 513500403 is 304005315.

It is not a de Polignac number, because 513500403 - 2¹³ = 513492211 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 513500403.

It is not an unprimeable number, because it can be changed into a prime (513500413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345751 + ... + 347232.

It is an arithmetic number, because the mean of its divisors is an integer number (48508880).

Almost surely, 2^513500403 is an apocalyptic number.

513500403 is a deficient number, since it is larger than the sum of its proper divisors (262641677).

513500403 is a wasteful number, since it uses less digits than its factorization.

513500403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693018.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 513500403 is about 22660.5472793576. The cubic root of 513500403 is about 800.7806977867.

Adding to 513500403 its reverse (304005315), we get a palindrome (817505718).

The spelling of 513500403 in words is "five hundred thirteen million, five hundred thousand, four hundred three".