22427 has 4 divisors (see below), whose sum is σ = 23016. Its totient is φ = 21840.

The previous prime is 22409. The next prime is 22433. The reversal of 22427 is 72422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22427 - 2⁸ = 22171 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7, base 9 and base 16.

It is not an unprimeable number, because it can be changed into a prime (22447) 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, 233 + ... + 314.

It is an arithmetic number, because the mean of its divisors is an integer number (5754).

2²²⁴²⁷ is an apocalyptic number.

22427 is a deficient number, since it is larger than the sum of its proper divisors (589).

22427 is an equidigital number, since it uses as much as digits as its factorization.

22427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 224, while the sum is 17.

The square root of 22427 is about 149.7564689755. The cubic root of 22427 is about 28.2005163965.

Adding to 22427 its reverse (72422), we get a palindrome (94849).

The spelling of 22427 in words is "twenty-two thousand, four hundred twenty-seven", and thus it is an iban number.