51512351232 has 80 divisors (see below), whose sum is σ = 137356065792. Its totient is φ = 17155276800.

The previous prime is 51512351227. The next prime is 51512351257. The reversal of 51512351232 is 23215321515.

It is a self number, because there is not a number n which added to its sum of digits gives 51512351232.

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, 1753368 + ... + 1782504.

Almost surely, 2^51512351232 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 51512351232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68678032896).

51512351232 is an abundant number, since it is smaller than the sum of its proper divisors (85843714560).

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

51512351232 is a wasteful number, since it uses less digits than its factorization.

51512351232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30309 (or 30293 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

Adding to 51512351232 its reverse (23215321515), we get a palindrome (74727672747).

The spelling of 51512351232 in words is "fifty-one billion, five hundred twelve million, three hundred fifty-one thousand, two hundred thirty-two".