50221221 has 8 divisors (see below), whose sum is σ = 67024320. Its totient is φ = 33449472.

The previous prime is 50221217. The next prime is 50221231. The reversal of 50221221 is 12212205.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50221221 - 2² = 50221217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50221201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 10718.

It is an arithmetic number, because the mean of its divisors is an integer number (8378040).

Almost surely, 2^50221221 is an apocalyptic number.

It is an amenable number.

50221221 is a deficient number, since it is larger than the sum of its proper divisors (16803099).

50221221 is a wasteful number, since it uses less digits than its factorization.

50221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15675.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 50221221 is about 7086.6932345065. The cubic root of 50221221 is about 368.9456739523.

Adding to 50221221 its reverse (12212205), we get a palindrome (62433426).

The spelling of 50221221 in words is "fifty million, two hundred twenty-one thousand, two hundred twenty-one".