50121220 has 24 divisors (see below), whose sum is σ = 105399000. Its totient is φ = 20020992.

The previous prime is 50121217. The next prime is 50121233. The reversal of 50121220 is 2212105.

It can be written as a sum of positive squares in 4 ways, for example, as 8156736 + 41964484 = 2856^2 + 6478^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 50121220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19786 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (4391625).

Almost surely, 2^50121220 is an apocalyptic number.

It is an amenable number.

50121220 is an abundant number, since it is smaller than the sum of its proper divisors (55277780).

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

50121220 is a wasteful number, since it uses less digits than its factorization.

50121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447 (or 3445 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 50121220 is about 7079.6341713396. The cubic root of 50121220 is about 368.7006284565.

Adding to 50121220 its reverse (2212105), we get a palindrome (52333325).

The spelling of 50121220 in words is "fifty million, one hundred twenty-one thousand, two hundred twenty".