513321230403 has 24 divisors (see below), whose sum is σ = 745137913520. Its totient is φ = 340522341120.

The previous prime is 513321230351. The next prime is 513321230423. The reversal of 513321230403 is 304032123315.

513321230403 is a `hidden beast` number, since 5 + 1 + 3 + 3 + 21 + 230 + 403 = 666.

It is not a de Polignac number, because 513321230403 - 2⁶ = 513321230339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513321230423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1448943 + ... + 1768071.

Almost surely, 2^513321230403 is an apocalyptic number.

513321230403 is a deficient number, since it is larger than the sum of its proper divisors (231816683117).

513321230403 is a wasteful number, since it uses less digits than its factorization.

513321230403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320019 (or 320016 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 513321230403 its reverse (304032123315), we get a palindrome (817353353718).

It can be divided in two parts, 5133212 and 30403, that added together give a palindrome (5163615).

The spelling of 513321230403 in words is "five hundred thirteen billion, three hundred twenty-one million, two hundred thirty thousand, four hundred three".