63221 has 4 divisors (see below), whose sum is σ = 63744. Its totient is φ = 62700.

The previous prime is 63211. The next prime is 63241. The reversal of 63221 is 12236.

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 a de Polignac number, because none of the positive numbers 2^k-63221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 63196 and 63205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63211) 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, 26 + ... + 356.

It is an arithmetic number, because the mean of its divisors is an integer number (15936).

2⁶³²²¹ is an apocalyptic number.

It is an amenable number.

63221 is a deficient number, since it is larger than the sum of its proper divisors (523).

63221 is a wasteful number, since it uses less digits than its factorization.

63221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522.

The product of its digits is 72, while the sum is 14.

The square root of 63221 is about 251.4378650880. The cubic root of 63221 is about 39.8370453796.

Adding to 63221 its reverse (12236), we get a palindrome (75457).

The spelling of 63221 in words is "sixty-three thousand, two hundred twenty-one".