51322552320 has 336 divisors, whose sum is σ = 177569969472. Its totient is φ = 12582912000.

The previous prime is 51322552313. The next prime is 51322552349. The reversal of 51322552320 is 2325522315.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204472195 + ... + 204472445.

It is an arithmetic number, because the mean of its divisors is an integer number (528482052).

Almost surely, 2^51322552320 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 51322552320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88784984736).

51322552320 is an abundant number, since it is smaller than the sum of its proper divisors (126247417152).

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

51322552320 is an frugal number, since it uses more digits than its factorization.

51322552320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 51322552320 in words is "fifty-one billion, three hundred twenty-two million, five hundred fifty-two thousand, three hundred twenty".