51115224244 has 12 divisors (see below), whose sum is σ = 102230448544. Its totient is φ = 21906524664.

The previous prime is 51115224241. The next prime is 51115224253. The reversal of 51115224244 is 44242251115.

51115224244 is an admirable number.

It is a super-2 number, since 2×51115224244² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115224241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912771834 + ... + 912771889.

Almost surely, 2^51115224244 is an apocalyptic number.

It is an amenable number.

51115224244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51115224244 is a wasteful number, since it uses less digits than its factorization.

51115224244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825543734 (or 1825543732 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

Adding to 51115224244 its reverse (44242251115), we get a palindrome (95357475359).

The spelling of 51115224244 in words is "fifty-one billion, one hundred fifteen million, two hundred twenty-four thousand, two hundred forty-four".