51201100208 has 20 divisors (see below), whose sum is σ = 105037551720. Its totient is φ = 24094635264.

The previous prime is 51201100207. The next prime is 51201100261. The reversal of 51201100208 is 80200110215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51201100208.

It is not an unprimeable number, because it can be changed into a prime (51201100207) 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, 94119398 + ... + 94119941.

It is an arithmetic number, because the mean of its divisors is an integer number (5251877586).

Almost surely, 2^51201100208 is an apocalyptic number.

It is an amenable number.

51201100208 is an abundant number, since it is smaller than the sum of its proper divisors (53836451512).

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

51201100208 is a wasteful number, since it uses less digits than its factorization.

51201100208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188239364 (or 188239358 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The spelling of 51201100208 in words is "fifty-one billion, two hundred one million, one hundred thousand, two hundred eight".