51033320140 has 48 divisors (see below), whose sum is σ = 120944184480. Its totient is φ = 17917652480.

The previous prime is 51033320137. The next prime is 51033320141. The reversal of 51033320140 is 4102333015.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (51033320141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3993097 + ... + 4005856.

It is an arithmetic number, because the mean of its divisors is an integer number (2519670510).

Almost surely, 2^51033320140 is an apocalyptic number.

It is an amenable number.

51033320140 is an abundant number, since it is smaller than the sum of its proper divisors (69910864340).

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

51033320140 is a wasteful number, since it uses less digits than its factorization.

51033320140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999002 (or 7999000 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 51033320140 its reverse (4102333015), we get a palindrome (55135653155).

It can be divided in two parts, 51033 and 320140, that added together give a palindrome (371173).

The spelling of 51033320140 in words is "fifty-one billion, thirty-three million, three hundred twenty thousand, one hundred forty".