51200120 has 32 divisors (see below), whose sum is σ = 117378720. Its totient is φ = 20092800.

The previous prime is 51200111. The next prime is 51200129. The reversal of 51200120 is 2100215.

It is an interprime number because it is at equal distance from previous prime (51200111) and next prime (51200129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51200129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9956 + ... + 14195.

It is an arithmetic number, because the mean of its divisors is an integer number (3668085).

Almost surely, 2^51200120 is an apocalyptic number.

It is an amenable number.

51200120 is an abundant number, since it is smaller than the sum of its proper divisors (66178600).

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

51200120 is a wasteful number, since it uses less digits than its factorization.

51200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24215 (or 24211 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 51200120 is about 7155.4259132493. The cubic root of 51200120 is about 371.3273967881.

Adding to 51200120 its reverse (2100215), we get a palindrome (53300335).

The spelling of 51200120 in words is "fifty-one million, two hundred thousand, one hundred twenty".