50017221 has 6 divisors (see below), whose sum is σ = 72247110. Its totient is φ = 33344808.

The previous prime is 50017207. The next prime is 50017223. The reversal of 50017221 is 12271005.

It can be written as a sum of positive squares in only one way, i.e., 49702500 + 314721 = 7050^2 + 561^2 .

It is not a de Polignac number, because 50017221 - 2⁹ = 50016709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50017194 and 50017203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50017223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2778726 + ... + 2778743.

It is an arithmetic number, because the mean of its divisors is an integer number (12041185).

Almost surely, 2^50017221 is an apocalyptic number.

It is an amenable number.

50017221 is a deficient number, since it is larger than the sum of its proper divisors (22229889).

50017221 is a wasteful number, since it uses less digits than its factorization.

50017221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557475 (or 5557472 counting only the distinct ones).

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

The square root of 50017221 is about 7072.2854156206. The cubic root of 50017221 is about 368.4454401468.

Adding to 50017221 its reverse (12271005), we get a palindrome (62288226).

The spelling of 50017221 in words is "fifty million, seventeen thousand, two hundred twenty-one".