52221 has 12 divisors (see below), whose sum is σ = 76128. Its totient is φ = 31824.

The previous prime is 52201. The next prime is 52223. The reversal of 52221 is 12225.

It is not a de Polignac number, because 52221 - 2⁵ = 52189 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 52197 and 52206.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 52221.

It is not an unprimeable number, because it can be changed into a prime (52223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456 + ... + 558.

It is an arithmetic number, because the mean of its divisors is an integer number (6344).

2⁵²²²¹ is an apocalyptic number.

It is an amenable number.

52221 is a deficient number, since it is larger than the sum of its proper divisors (23907).

52221 is a wasteful number, since it uses less digits than its factorization.

52221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 119 counting only the distinct ones).

The product of its digits is 40, while the sum is 12.

The square root of 52221 is about 228.5191458062. The cubic root of 52221 is about 37.3779140765.

Adding to 52221 its reverse (12225), we get a palindrome (64446).

The spelling of 52221 in words is "fifty-two thousand, two hundred twenty-one".