51031344040 has 32 divisors (see below), whose sum is σ = 114937418880. Its totient is φ = 20391756352.

The previous prime is 51031344031. The next prime is 51031344101. The reversal of 51031344040 is 4044313015.

It is a junction number, because it is equal to n+sod(n) for n = 51031343996 and 51031344014.

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 7 ways as a sum of consecutive naturals, for example, 609604 + ... + 688243.

It is an arithmetic number, because the mean of its divisors is an integer number (3591794340).

Almost surely, 2^51031344040 is an apocalyptic number.

It is an amenable number.

51031344040 is an abundant number, since it is smaller than the sum of its proper divisors (63906074840).

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

51031344040 is a wasteful number, since it uses less digits than its factorization.

51031344040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298841 (or 1298837 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 51031344040 its reverse (4044313015), we get a palindrome (55075657055).

The spelling of 51031344040 in words is "fifty-one billion, thirty-one million, three hundred forty-four thousand, forty".