50311221 has 8 divisors (see below), whose sum is σ = 70612320. Its totient is φ = 31775472.

The previous prime is 50311213. The next prime is 50311241. The reversal of 50311221 is 12211305.

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

It is not a de Polignac number, because 50311221 - 2³ = 50311213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50311241) 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, 441270 + ... + 441383.

It is an arithmetic number, because the mean of its divisors is an integer number (8826540).

Almost surely, 2^50311221 is an apocalyptic number.

It is an amenable number.

50311221 is a deficient number, since it is larger than the sum of its proper divisors (20301099).

50311221 is a wasteful number, since it uses less digits than its factorization.

50311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882675.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 50311221 is about 7093.0403213291. The cubic root of 50311221 is about 369.1659347266.

Adding to 50311221 its reverse (12211305), we get a palindrome (62522526).

The spelling of 50311221 in words is "fifty million, three hundred eleven thousand, two hundred twenty-one".