50211221 has 4 divisors (see below), whose sum is σ = 50323500. Its totient is φ = 50098944.

The previous prime is 50211199. The next prime is 50211253. The reversal of 50211221 is 12211205.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36602500 + 13608721 = 6050^2 + 3689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50211221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50211196 and 50211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50217221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55466 + ... + 56363.

It is an arithmetic number, because the mean of its divisors is an integer number (12580875).

Almost surely, 2^50211221 is an apocalyptic number.

It is an amenable number.

50211221 is a deficient number, since it is larger than the sum of its proper divisors (112279).

50211221 is a wasteful number, since it uses less digits than its factorization.

50211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112278.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 50211221 is about 7085.9876516968. The cubic root of 50211221 is about 368.9211842938.

Adding to 50211221 its reverse (12211205), we get a palindrome (62422426).

The spelling of 50211221 in words is "fifty million, two hundred eleven thousand, two hundred twenty-one".