51059784220 has 12 divisors (see below), whose sum is σ = 107225546904. Its totient is φ = 20423913680.

The previous prime is 51059784187. The next prime is 51059784221. The reversal of 51059784220 is 2248795015.

It is a super-2 number, since 2×51059784220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51059784221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276494586 + ... + 1276494625.

It is an arithmetic number, because the mean of its divisors is an integer number (8935462242).

Almost surely, 2^51059784220 is an apocalyptic number.

It is an amenable number.

51059784220 is an abundant number, since it is smaller than the sum of its proper divisors (56165762684).

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

51059784220 is a wasteful number, since it uses less digits than its factorization.

51059784220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552989220 (or 2552989218 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 51059784220 in words is "fifty-one billion, fifty-nine million, seven hundred eighty-four thousand, two hundred twenty".