51115324244 has 6 divisors (see below), whose sum is σ = 89451817434. Its totient is φ = 25557662120.

The previous prime is 51115324241. The next prime is 51115324283. The reversal of 51115324244 is 44242351115.

It can be written as a sum of positive squares in only one way, i.e., 41692739344 + 9422584900 = 204188^2 + 97070^2 .

It is a super-2 number, since 2×51115324244² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51115324244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115324241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389415527 + ... + 6389415534.

It is an arithmetic number, because the mean of its divisors is an integer number (14908636239).

Almost surely, 2^51115324244 is an apocalyptic number.

It is an amenable number.

51115324244 is a deficient number, since it is larger than the sum of its proper divisors (38336493190).

51115324244 is a wasteful number, since it uses less digits than its factorization.

51115324244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778831065 (or 12778831063 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

Adding to 51115324244 its reverse (44242351115), we get a palindrome (95357675359).

The spelling of 51115324244 in words is "fifty-one billion, one hundred fifteen million, three hundred twenty-four thousand, two hundred forty-four".