51502232240 has 40 divisors (see below), whose sum is σ = 119752134480. Its totient is φ = 20599268096.

The previous prime is 51502232239. The next prime is 51502232273. The reversal of 51502232240 is 4223220515.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1947587 + ... + 1973853.

It is an arithmetic number, because the mean of its divisors is an integer number (2993803362).

Almost surely, 2^51502232240 is an apocalyptic number.

It is an amenable number.

51502232240 is an abundant number, since it is smaller than the sum of its proper divisors (68249902240).

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

51502232240 is a wasteful number, since it uses less digits than its factorization.

51502232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50789 (or 50783 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 51502232240 its reverse (4223220515), we get a palindrome (55725452755).

The spelling of 51502232240 in words is "fifty-one billion, five hundred two million, two hundred thirty-two thousand, two hundred forty".