51304203513 has 12 divisors (see below), whose sum is σ = 74482247268. Its totient is φ = 34029182880.

The previous prime is 51304203497. The next prime is 51304203529. The reversal of 51304203513 is 31530240315.

51304203513 is a `hidden beast` number, since 5 + 1 + 304 + 2 + 0 + 351 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (51304203497) and next prime (51304203529).

It can be written as a sum of positive squares in 2 ways, for example, as 25564172544 + 25740030969 = 159888^2 + 160437^2 .

It is not a de Polignac number, because 51304203513 - 2⁴ = 51304203497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51304203563) 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, 14466418 + ... + 14469963.

It is an arithmetic number, because the mean of its divisors is an integer number (6206853939).

Almost surely, 2^51304203513 is an apocalyptic number.

It is an amenable number.

51304203513 is a deficient number, since it is larger than the sum of its proper divisors (23178043755).

51304203513 is a wasteful number, since it uses less digits than its factorization.

51304203513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28936584 (or 28936581 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 51304203513 its reverse (31530240315), we get a palindrome (82834443828).

The spelling of 51304203513 in words is "fifty-one billion, three hundred four million, two hundred three thousand, five hundred thirteen".