22437 has 10 divisors (see below), whose sum is σ = 33638. Its totient is φ = 14904.

The previous prime is 22433. The next prime is 22441. The reversal of 22437 is 73422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22433) and next prime (22441).

It can be written as a sum of positive squares in only one way, i.e., 15876 + 6561 = 126^2 + 81^2 .

It is not a de Polignac number, because 22437 - 2² = 22433 is a prime.

It is a Duffinian number.

22437 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22437.

It is not an unprimeable number, because it can be changed into a prime (22433) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 58 + ... + 219.

2²²⁴³⁷ is an apocalyptic number.

22437 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22437 is a deficient number, since it is larger than the sum of its proper divisors (11201).

22437 is an equidigital number, since it uses as much as digits as its factorization.

22437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 280 counting only the distinct ones).

The product of its digits is 336, while the sum is 18.

The square root of 22437 is about 149.7898527938. The cubic root of 22437 is about 28.2047072269.

Adding to 22437 its reverse (73422), we get a palindrome (95859).

The spelling of 22437 in words is "twenty-two thousand, four hundred thirty-seven".