51340453220 has 96 divisors (see below), whose sum is σ = 130777597440. Its totient is φ = 16527329280.

The previous prime is 51340453193. The next prime is 51340453273. The reversal of 51340453220 is 2235404315.

It is a happy number.

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, 976361 + ... + 1027599.

It is an arithmetic number, because the mean of its divisors is an integer number (1362266640).

Almost surely, 2^51340453220 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 51340453220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65388798720).

51340453220 is an abundant number, since it is smaller than the sum of its proper divisors (79437144220).

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

51340453220 is a wasteful number, since it uses less digits than its factorization.

51340453220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51693 (or 51691 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 51340453220 its reverse (2235404315), we get a palindrome (53575857535).

The spelling of 51340453220 in words is "fifty-one billion, three hundred forty million, four hundred fifty-three thousand, two hundred twenty".