51001040244 has 288 divisors, whose sum is σ = 160784870400. Its totient is φ = 12406141440.

The previous prime is 51001040231. The next prime is 51001040297. The reversal of 51001040244 is 44204010015.

It is a happy number.

It is a super-2 number, since 2×51001040244² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 51001040244.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 10935057 + ... + 10939719.

It is an arithmetic number, because the mean of its divisors is an integer number (558280800).

Almost surely, 2^51001040244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51001040244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80392435200).

51001040244 is an abundant number, since it is smaller than the sum of its proper divisors (109783830156).

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

51001040244 is a wasteful number, since it uses less digits than its factorization.

51001040244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803 (or 4794 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 51001040244 its reverse (44204010015), we get a palindrome (95205050259).

The spelling of 51001040244 in words is "fifty-one billion, one million, forty thousand, two hundred forty-four".