51241031440 has 80 divisors (see below), whose sum is σ = 126221193648. Its totient is φ = 19278839808.

The previous prime is 51241031437. The next prime is 51241031453. The reversal of 51241031440 is 4413014215.

It can be written as a sum of positive squares in 8 ways, for example, as 10675848976 + 40565182464 = 103324^2 + 201408^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2373334 + ... + 2394826.

Almost surely, 2^51241031440 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 51241031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63110596824).

51241031440 is an abundant number, since it is smaller than the sum of its proper divisors (74980162208).

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

51241031440 is a wasteful number, since it uses less digits than its factorization.

51241031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23276 (or 23270 counting only the distinct ones).

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

Adding to 51241031440 its reverse (4413014215), we get a palindrome (55654045655).

The spelling of 51241031440 in words is "fifty-one billion, two hundred forty-one million, thirty-one thousand, four hundred forty".