51505120332 has 18 divisors (see below), whose sum is σ = 130193498708. Its totient is φ = 17168373432.

The previous prime is 51505120321. The next prime is 51505120339. The reversal of 51505120332 is 23302150515.

It is a happy number.

51505120332 is a `hidden beast` number, since 5 + 1 + 505 + 120 + 3 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 51505120296 and 51505120305.

It is not an unprimeable number, because it can be changed into a prime (51505120339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715348858 + ... + 715348929.

Almost surely, 2^51505120332 is an apocalyptic number.

It is an amenable number.

51505120332 is an abundant number, since it is smaller than the sum of its proper divisors (78688378376).

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

51505120332 is a wasteful number, since it uses less digits than its factorization.

51505120332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430697797 (or 1430697792 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 51505120332 its reverse (23302150515), we get a palindrome (74807270847).

The spelling of 51505120332 in words is "fifty-one billion, five hundred five million, one hundred twenty thousand, three hundred thirty-two".