22361 has 4 divisors (see below), whose sum is σ = 22800. Its totient is φ = 21924.

The previous prime is 22349. The next prime is 22367. The reversal of 22361 is 16322.

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 an emirpimes, since its reverse is a distinct semiprime: 16322 = 2 ⋅8161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22361 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (22367) 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, 131 + ... + 248.

It is an arithmetic number, because the mean of its divisors is an integer number (5700).

2²²³⁶¹ is an apocalyptic number.

It is an amenable number.

22361 is a deficient number, since it is larger than the sum of its proper divisors (439).

22361 is an equidigital number, since it uses as much as digits as its factorization.

22361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

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

The square root of 22361 is about 149.5359488551. The cubic root of 22361 is about 28.1728256239.

Adding to 22361 its reverse (16322), we get a palindrome (38683).

It can be divided in two parts, 22 and 361, that added together give a palindrome (383).

The spelling of 22361 in words is "twenty-two thousand, three hundred sixty-one".