51430444320 has 192 divisors, whose sum is σ = 163956151296. Its totient is φ = 13550284800.

The previous prime is 51430444243. The next prime is 51430444337. The reversal of 51430444320 is 2344403415.

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 31 ways as a sum of consecutive naturals, for example, 32820177 + ... + 32821743.

It is an arithmetic number, because the mean of its divisors is an integer number (853938288).

Almost surely, 2^51430444320 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 51430444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81978075648).

51430444320 is an abundant number, since it is smaller than the sum of its proper divisors (112525706976).

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

51430444320 is a wasteful number, since it uses less digits than its factorization.

51430444320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 51430444320 its reverse (2344403415), we get a palindrome (53774847735).

The spelling of 51430444320 in words is "fifty-one billion, four hundred thirty million, four hundred forty-four thousand, three hundred twenty".