51323540000 has 60 divisors (see below), whose sum is σ = 126263656134. Its totient is φ = 20529408000.

The previous prime is 51323539999. The next prime is 51323540033. The reversal of 51323540000 is 4532315.

It can be written as a sum of positive squares in 5 ways, for example, as 6095861776 + 45227678224 = 78076^2 + 212668^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1263089 + ... + 1303088.

Almost surely, 2^51323540000 is an apocalyptic number.

51323540000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51323540000 is an abundant number, since it is smaller than the sum of its proper divisors (74940116134).

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

51323540000 is an equidigital number, since it uses as much as digits as its factorization.

51323540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566207 (or 2566184 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 51323540000 in words is "fifty-one billion, three hundred twenty-three million, five hundred forty thousand".