51330552352 has 48 divisors (see below), whose sum is σ = 107372132280. Its totient is φ = 24155480064.

The previous prime is 51330552341. The next prime is 51330552353. The reversal of 51330552352 is 25325503315.

It can be written as a sum of positive squares in 4 ways, for example, as 45712150416 + 5618401936 = 213804^2 + 74956^2 .

It is a super-2 number, since 2×51330552352² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (51330552353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6033 + ... + 320464.

Almost surely, 2^51330552352 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 51330552352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53686066140).

51330552352 is an abundant number, since it is smaller than the sum of its proper divisors (56041579928).

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

51330552352 is an equidigital number, since it uses as much as digits as its factorization.

51330552352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326558 (or 326516 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 34.

The spelling of 51330552352 in words is "fifty-one billion, three hundred thirty million, five hundred fifty-two thousand, three hundred fifty-two".