50513220 has 60 divisors (see below), whose sum is σ = 158466924. Its totient is φ = 13469760.

The previous prime is 50513209. The next prime is 50513227. The reversal of 50513220 is 2231505.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 42928704 = 2754^2 + 6552^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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 = 50513193 and 50513202.

It is not an unprimeable number, because it can be changed into a prime (50513227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13971 + ... + 17210.

Almost surely, 2^50513220 is an apocalyptic number.

It is an amenable number.

50513220 is an abundant number, since it is smaller than the sum of its proper divisors (107953704).

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

50513220 is a wasteful number, since it uses less digits than its factorization.

50513220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31202 (or 31191 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 50513220 is about 7107.2652968635. The cubic root of 50513220 is about 369.6593406998.

Adding to 50513220 its reverse (2231505), we get a palindrome (52744725).

The spelling of 50513220 in words is "fifty million, five hundred thirteen thousand, two hundred twenty".