51322305231 has 24 divisors (see below), whose sum is σ = 74993143680. Its totient is φ = 33819813456.

The previous prime is 51322305211. The next prime is 51322305239. The reversal of 51322305231 is 13250322315.

It is a happy number.

51322305231 is a `hidden beast` number, since 5 + 1 + 322 + 305 + 2 + 31 = 666.

It is not a de Polignac number, because 51322305231 - 2⁷ = 51322305103 is a prime.

It is a super-2 number, since 2×51322305231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51322305195 and 51322305204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51322305239) 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, 173656 + ... + 364418.

It is an arithmetic number, because the mean of its divisors is an integer number (3124714320).

Almost surely, 2^51322305231 is an apocalyptic number.

51322305231 is a deficient number, since it is larger than the sum of its proper divisors (23670838449).

51322305231 is a wasteful number, since it uses less digits than its factorization.

51322305231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191115 (or 191112 counting only the distinct ones).

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

Adding to 51322305231 its reverse (13250322315), we get a palindrome (64572627546).

The spelling of 51322305231 in words is "fifty-one billion, three hundred twenty-two million, three hundred five thousand, two hundred thirty-one".