51200320122 has 48 divisors (see below), whose sum is σ = 128386602240. Its totient is φ = 14443487136.

The previous prime is 51200320057. The next prime is 51200320123. The reversal of 51200320122 is 22102300215.

51200320122 is a `hidden beast` number, since 512 + 0 + 0 + 32 + 0 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51200320095 and 51200320104.

It is not an unprimeable number, because it can be changed into a prime (51200320123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2561893 + ... + 2581800.

It is an arithmetic number, because the mean of its divisors is an integer number (2674720880).

Almost surely, 2^51200320122 is an apocalyptic number.

51200320122 is an abundant number, since it is smaller than the sum of its proper divisors (77186282118).

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

51200320122 is a wasteful number, since it uses less digits than its factorization.

51200320122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143787 (or 5143784 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 51200320122 its reverse (22102300215), we get a palindrome (73302620337).

The spelling of 51200320122 in words is "fifty-one billion, two hundred million, three hundred twenty thousand, one hundred twenty-two".