51031110224 has 20 divisors (see below), whose sum is σ = 102282183060. Its totient is φ = 24635708160.

The previous prime is 51031110223. The next prime is 51031110239. The reversal of 51031110224 is 42201113015.

It can be written as a sum of positive squares in 2 ways, for example, as 35280860224 + 15750250000 = 187832^2 + 125500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51031110196 and 51031110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031110223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54989957 + ... + 54990884.

It is an arithmetic number, because the mean of its divisors is an integer number (5114109153).

Almost surely, 2^51031110224 is an apocalyptic number.

It is an amenable number.

51031110224 is an abundant number, since it is smaller than the sum of its proper divisors (51251072836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51031110224 is a wasteful number, since it uses less digits than its factorization.

51031110224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109980878 (or 109980872 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 51031110224 its reverse (42201113015), we get a palindrome (93232223239).

The spelling of 51031110224 in words is "fifty-one billion, thirty-one million, one hundred ten thousand, two hundred twenty-four".