51440121232 has 20 divisors (see below), whose sum is σ = 99682369920. Its totient is φ = 25715638688.

The previous prime is 51440121217. The next prime is 51440121247. The reversal of 51440121232 is 23212104415.

It is an interprime number because it is at equal distance from previous prime (51440121217) and next prime (51440121247).

It is a junction number, because it is equal to n+sod(n) for n = 51440121197 and 51440121206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179368 + ... + 367495.

It is an arithmetic number, because the mean of its divisors is an integer number (4984118496).

Almost surely, 2^51440121232 is an apocalyptic number.

It is an amenable number.

51440121232 is a deficient number, since it is larger than the sum of its proper divisors (48242248688).

51440121232 is a wasteful number, since it uses less digits than its factorization.

51440121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552750 (or 552744 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 51440121232 its reverse (23212104415), we get a palindrome (74652225647).

The spelling of 51440121232 in words is "fifty-one billion, four hundred forty million, one hundred twenty-one thousand, two hundred thirty-two".