51530331200 has 84 divisors (see below), whose sum is σ = 129189426660. Its totient is φ = 20223191040.

The previous prime is 51530331187. The next prime is 51530331221. The reversal of 51530331200 is 213303515.

It can be written as a sum of positive squares in 6 ways, for example, as 1812034624 + 49718296576 = 42568^2 + 222976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219035 + ... + 388634.

It is an arithmetic number, because the mean of its divisors is an integer number (1537969365).

Almost surely, 2^51530331200 is an apocalyptic number.

51530331200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51530331200 is an abundant number, since it is smaller than the sum of its proper divisors (77659095460).

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

51530331200 is a wasteful number, since it uses less digits than its factorization.

51530331200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607744 (or 607729 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 23.

Adding to 51530331200 its reverse (213303515), we get a palindrome (51743634715).

The spelling of 51530331200 in words is "fifty-one billion, five hundred thirty million, three hundred thirty-one thousand, two hundred".