252221 has 4 divisors (see below), whose sum is σ = 253344. Its totient is φ = 251100.

The previous prime is 252209. The next prime is 252223. The reversal of 252221 is 122252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 252221 - 2⁶ = 252157 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252196 and 252205.

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 252221.

It is not an unprimeable number, because it can be changed into a prime (252223) 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, 95 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (63336).

2²⁵²²²¹ is an apocalyptic number.

It is an amenable number.

252221 is a deficient number, since it is larger than the sum of its proper divisors (1123).

252221 is an equidigital number, since it uses as much as digits as its factorization.

252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its digits is 80, while the sum is 14.

The square root of 252221 is about 502.2160889498. The cubic root of 252221 is about 63.1820550719.

Adding to 252221 its reverse (122252), we get a palindrome (374473).

The spelling of 252221 in words is "two hundred fifty-two thousand, two hundred twenty-one".