50571221 has 4 divisors (see below), whose sum is σ = 50940492. Its totient is φ = 50201952.

The previous prime is 50571197. The next prime is 50571281. The reversal of 50571221 is 12217505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12217505 = 5 ⋅2443501.

It can be written as a sum of positive squares in 2 ways, for example, as 30195025 + 20376196 = 5495^2 + 4514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50571221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50571281) 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, 184430 + ... + 184703.

It is an arithmetic number, because the mean of its divisors is an integer number (12735123).

Almost surely, 2^50571221 is an apocalyptic number.

It is an amenable number.

50571221 is a deficient number, since it is larger than the sum of its proper divisors (369271).

50571221 is a wasteful number, since it uses less digits than its factorization.

50571221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369270.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 50571221 is about 7111.3445282872. The cubic root of 50571221 is about 369.8007717309.

Adding to 50571221 its reverse (12217505), we get a palindrome (62788726).

The spelling of 50571221 in words is "fifty million, five hundred seventy-one thousand, two hundred twenty-one".