50531220 has 36 divisors (see below), whose sum is σ = 153278580. Its totient is φ = 13474944.

The previous prime is 50531219. The next prime is 50531231. The reversal of 50531220 is 2213505.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9622404 + 40908816 = 3102^2 + 6396^2 .

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 = 50531193 and 50531202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140185 + ... + 140544.

Almost surely, 2^50531220 is an apocalyptic number.

It is an amenable number.

50531220 is an abundant number, since it is smaller than the sum of its proper divisors (102747360).

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

50531220 is a wasteful number, since it uses less digits than its factorization.

50531220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280744 (or 280739 counting only the distinct ones).

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

The square root of 50531220 is about 7108.5314939163. The cubic root of 50531220 is about 369.7032439126.

Adding to 50531220 its reverse (2213505), we get a palindrome (52744725).

The spelling of 50531220 in words is "fifty million, five hundred thirty-one thousand, two hundred twenty".