50009220 has 36 divisors (see below), whose sum is σ = 151695180. Its totient is φ = 13335744.

The previous prime is 50009209. The next prime is 50009221. The reversal of 50009220 is 2290005.

It can be written as a sum of positive squares in 2 ways, for example, as 39237696 + 10771524 = 6264^2 + 3282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 50009193 and 50009202.

It is not an unprimeable number, because it can be changed into a prime (50009221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138735 + ... + 139094.

It is an arithmetic number, because the mean of its divisors is an integer number (4213755).

Almost surely, 2^50009220 is an apocalyptic number.

It is an amenable number.

50009220 is an abundant number, since it is smaller than the sum of its proper divisors (101685960).

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

50009220 is a wasteful number, since it uses less digits than its factorization.

50009220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277844 (or 277839 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 50009220 is about 7071.7197342655. The cubic root of 50009220 is about 368.4257929859.

Adding to 50009220 its reverse (2290005), we get a palindrome (52299225).

The spelling of 50009220 in words is "fifty million, nine thousand, two hundred twenty".