50721120 has 192 divisors, whose sum is σ = 181440000. Its totient is φ = 13229568.

The previous prime is 50721113. The next prime is 50721157. The reversal of 50721120 is 2112705.

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 = 50721093 and 50721102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254781 + ... + 254979.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^50721120 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 50721120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90720000).

50721120 is an abundant number, since it is smaller than the sum of its proper divisors (130718880).

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

50721120 is a wasteful number, since it uses less digits than its factorization.

50721120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 50721120 is about 7121.8761573057. The cubic root of 50721120 is about 370.1657888630.

Adding to 50721120 its reverse (2112705), we get a palindrome (52833825).

The spelling of 50721120 in words is "fifty million, seven hundred twenty-one thousand, one hundred twenty".