22461 has 4 divisors (see below), whose sum is σ = 29952. Its totient is φ = 14972.

The previous prime is 22453. The next prime is 22469. The reversal of 22461 is 16422.

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.

It is an interprime number because it is at equal distance from previous prime (22453) and next prime (22469).

It is a cyclic number.

It is not a de Polignac number, because 22461 - 2³ = 22453 is a prime.

It is a D-number.

22461 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 22461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741 + ... + 3746.

It is an arithmetic number, because the mean of its divisors is an integer number (7488).

2²²⁴⁶¹ is an apocalyptic number.

It is an amenable number.

22461 is a deficient number, since it is larger than the sum of its proper divisors (7491).

22461 is an equidigital number, since it uses as much as digits as its factorization.

22461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490.

The product of its digits is 96, while the sum is 15.

The square root of 22461 is about 149.8699436178. The cubic root of 22461 is about 28.2147601419.

Adding to 22461 its reverse (16422), we get a palindrome (38883).

The spelling of 22461 in words is "twenty-two thousand, four hundred sixty-one".