51915303812 has 12 divisors (see below), whose sum is σ = 90969929820. Its totient is φ = 25923895296.

The previous prime is 51915303793. The next prime is 51915303857. The reversal of 51915303812 is 21830351915.

It can be written as a sum of positive squares in 2 ways, for example, as 29688668416 + 22226635396 = 172304^2 + 149086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8435693 + ... + 8441844.

It is an arithmetic number, because the mean of its divisors is an integer number (7580827485).

Almost surely, 2^51915303812 is an apocalyptic number.

It is an amenable number.

51915303812 is a deficient number, since it is larger than the sum of its proper divisors (39054626008).

51915303812 is a wasteful number, since it uses less digits than its factorization.

51915303812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16878310 (or 16878308 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 51915303812 in words is "fifty-one billion, nine hundred fifteen million, three hundred three thousand, eight hundred twelve".