22487 has 4 divisors (see below), whose sum is σ = 22800. Its totient is φ = 22176.

The previous prime is 22483. The next prime is 22501. The reversal of 22487 is 78422.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22487 - 2² = 22483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22481) 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, 14 + ... + 212.

It is an arithmetic number, because the mean of its divisors is an integer number (5700).

2²²⁴⁸⁷ is an apocalyptic number.

22487 is a deficient number, since it is larger than the sum of its proper divisors (313).

22487 is a wasteful number, since it uses less digits than its factorization.

22487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its digits is 896, while the sum is 23.

The square root of 22487 is about 149.9566604056. The cubic root of 22487 is about 28.2256427219.

The spelling of 22487 in words is "twenty-two thousand, four hundred eighty-seven".