22387 has 4 divisors (see below), whose sum is σ = 22816. Its totient is φ = 21960.

The previous prime is 22381. The next prime is 22391. The reversal of 22387 is 78322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78322 = 2 ⋅39161.

It is not a de Polignac number, because 22387 - 2⁷ = 22259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22381) 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, 123 + ... + 244.

It is an arithmetic number, because the mean of its divisors is an integer number (5704).

2²²³⁸⁷ is an apocalyptic number.

22387 is a deficient number, since it is larger than the sum of its proper divisors (429).

22387 is an equidigital number, since it uses as much as digits as its factorization.

22387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 672, while the sum is 22.

The square root of 22387 is about 149.6228592161. The cubic root of 22387 is about 28.1837406061.

It can be divided in two parts, 2 and 2387, that multiplied together give a palindrome (4774).

The spelling of 22387 in words is "twenty-two thousand, three hundred eighty-seven".