222639 has 8 divisors (see below), whose sum is σ = 303360. Its totient is φ = 145176.

The previous prime is 222619. The next prime is 222643. The reversal of 222639 is 936222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222639 - 2⁷ = 222511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (37920).

2²²²⁶³⁹ is an apocalyptic number.

222639 is a deficient number, since it is larger than the sum of its proper divisors (80721).

222639 is a wasteful number, since it uses less digits than its factorization.

222639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 1296, while the sum is 24.

The square root of 222639 is about 471.8463733039. The cubic root of 222639 is about 60.6085295535.

It can be divided in two parts, 222 and 639, that added together give a triangular number (861 = T₄₁).

The spelling of 222639 in words is "two hundred twenty-two thousand, six hundred thirty-nine".