51521351323 has 12 divisors (see below), whose sum is σ = 57086828040. Its totient is φ = 46452159936.

The previous prime is 51521351317. The next prime is 51521351327. The reversal of 51521351323 is 32315312515.

It is not a de Polignac number, because 51521351323 - 2¹⁷ = 51521220251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51521351327) 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, 3537618 + ... + 3552151.

It is an arithmetic number, because the mean of its divisors is an integer number (4757235670).

Almost surely, 2^51521351323 is an apocalyptic number.

51521351323 is a deficient number, since it is larger than the sum of its proper divisors (5565476717).

51521351323 is a wasteful number, since it uses less digits than its factorization.

51521351323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089838 (or 7089825 counting only the distinct ones).

The product of its digits is 13500, while the sum is 31.

Adding to 51521351323 its reverse (32315312515), we get a palindrome (83836663838).

The spelling of 51521351323 in words is "fifty-one billion, five hundred twenty-one million, three hundred fifty-one thousand, three hundred twenty-three".