51420030032 has 160 divisors (see below), whose sum is σ = 118733472000. Its totient is φ = 21557491200.

The previous prime is 51420030031. The next prime is 51420030037. The reversal of 51420030032 is 23003002415.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51420029986 and 51420030013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51420030031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90052307 + ... + 90052877.

It is an arithmetic number, because the mean of its divisors is an integer number (742084200).

Almost surely, 2^51420030032 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 51420030032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59366736000).

51420030032 is an abundant number, since it is smaller than the sum of its proper divisors (67313441968).

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

51420030032 is a wasteful number, since it uses less digits than its factorization.

51420030032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 51420030032 its reverse (23003002415), we get a palindrome (74423032447).

The spelling of 51420030032 in words is "fifty-one billion, four hundred twenty million, thirty thousand, thirty-two".