Search a number
-
+
22621 is a prime number
BaseRepresentation
bin101100001011101
31011000211
411201131
51210441
6252421
7122644
oct54135
934024
1022621
1115aa5
1211111
13a3b1
14835b
156a81
hex585d

22621 has 2 divisors, whose sum is σ = 22622. Its totient is φ = 22620.

The previous prime is 22619. The next prime is 22637. The reversal of 22621 is 12622.

It is a happy number.

22621 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22500 + 121 = 150^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 22621 - 21 = 22619 is a prime.

Together with 22619, it forms a pair of twin primes.

It is a Chen prime.

22621 is a nontrivial repdigit in base 12.

It is a plaindrome in base 12.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22651) by changing a digit.

It is a nontrivial repunit in base 12.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310 + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (11311).

222621 is an apocalyptic number.

It is an amenable number.

22621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22621 is an equidigital number, since it uses as much as digits as its factorization.

22621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 13.

The square root of 22621 is about 150.4027925273. The cubic root of 22621 is about 28.2815972455.

Subtracting from 22621 its reverse (12622), we obtain a palindrome (9999).

The spelling of 22621 in words is "twenty-two thousand, six hundred twenty-one".