51040320231 has 16 divisors (see below), whose sum is σ = 68243155200. Its totient is φ = 33932240448.

The previous prime is 51040320223. The next prime is 51040320319. The reversal of 51040320231 is 13202304015.

It is not a de Polignac number, because 51040320231 - 2³ = 51040320223 is a prime.

It is a super-2 number, since 2×51040320231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51040320198 and 51040320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5220910 + ... + 5230676.

It is an arithmetic number, because the mean of its divisors is an integer number (4265197200).

Almost surely, 2^51040320231 is an apocalyptic number.

51040320231 is a deficient number, since it is larger than the sum of its proper divisors (17202834969).

51040320231 is a wasteful number, since it uses less digits than its factorization.

51040320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14438.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 51040320231 its reverse (13202304015), we get a palindrome (64242624246).

The spelling of 51040320231 in words is "fifty-one billion, forty million, three hundred twenty thousand, two hundred thirty-one".