50819221 has 4 divisors (see below), whose sum is σ = 50979852. Its totient is φ = 50658592.

The previous prime is 50819207. The next prime is 50819233. The reversal of 50819221 is 12291805.

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 24860196 + 25959025 = 4986^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 50819221 - 2⁹ = 50818709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50819221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50819291) 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, 79840 + ... + 80473.

It is an arithmetic number, because the mean of its divisors is an integer number (12744963).

Almost surely, 2^50819221 is an apocalyptic number.

It is an amenable number.

50819221 is a deficient number, since it is larger than the sum of its proper divisors (160631).

50819221 is a wasteful number, since it uses less digits than its factorization.

50819221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160630.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 50819221 is about 7128.7601306258. The cubic root of 50819221 is about 370.4042841714.

It can be divided in two parts, 50819 and 221, that added together give a triangular number (51040 = T₃₁₉).

The spelling of 50819221 in words is "fifty million, eight hundred nineteen thousand, two hundred twenty-one".