222687 has 12 divisors (see below), whose sum is σ = 326040. Its totient is φ = 146448.

The previous prime is 222679. The next prime is 222707. The reversal of 222687 is 786222.

It is not a de Polignac number, because 222687 - 2³ = 222679 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 222687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 868 + ... + 1094.

It is an arithmetic number, because the mean of its divisors is an integer number (27170).

2²²²⁶⁸⁷ is an apocalyptic number.

222687 is a deficient number, since it is larger than the sum of its proper divisors (103353).

222687 is a wasteful number, since it uses less digits than its factorization.

222687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 339 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 222687 is about 471.8972345755. The cubic root of 222687 is about 60.6128848856.

It can be divided in two parts, 222 and 687, that added together give a palindrome (909).

The spelling of 222687 in words is "two hundred twenty-two thousand, six hundred eighty-seven".