51502381140 has 96 divisors (see below), whose sum is σ = 165132092160. Its totient is φ = 11748796416.

The previous prime is 51502381109. The next prime is 51502381157. The reversal of 51502381140 is 4118320515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51502381098 and 51502381107.

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 31 ways as a sum of consecutive naturals, for example, 93324 + ... + 334236.

It is an arithmetic number, because the mean of its divisors is an integer number (1720125960).

Almost surely, 2^51502381140 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 51502381140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82566046080).

51502381140 is an abundant number, since it is smaller than the sum of its proper divisors (113629711020).

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

51502381140 is a wasteful number, since it uses less digits than its factorization.

51502381140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241441 (or 241439 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 51502381140 in words is "fifty-one billion, five hundred two million, three hundred eighty-one thousand, one hundred forty".