22558 has 4 divisors (see below), whose sum is σ = 33840. Its totient is φ = 11278.

The previous prime is 22549. The next prime is 22567. The reversal of 22558 is 85522.

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

It is an interprime number because it is at equal distance from previous prime (22549) and next prime (22567).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹¹ + 2¹⁴ + 5 + 5² + 8⁴ .

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5638 + ... + 5641.

It is an arithmetic number, because the mean of its divisors is an integer number (8460).

2²²⁵⁵⁸ is an apocalyptic number.

22558 is a deficient number, since it is larger than the sum of its proper divisors (11282).

22558 is a wasteful number, since it uses less digits than its factorization.

22558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11281.

The product of its digits is 800, while the sum is 22.

The square root of 22558 is about 150.1932089011. The cubic root of 22558 is about 28.2553178701.

The spelling of 22558 in words is "twenty-two thousand, five hundred fifty-eight".