222618 has 16 divisors (see below), whose sum is σ = 485856. Its totient is φ = 67440.

The previous prime is 222613. The next prime is 222619. The reversal of 222618 is 816222.

It is a junction number, because it is equal to n+sod(n) for n = 222594 and 222603.

It is not an unprimeable number, because it can be changed into a prime (222613) 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, 1621 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (30366).

2²²²⁶¹⁸ is an apocalyptic number.

222618 is an abundant number, since it is smaller than the sum of its proper divisors (263238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222618 is a wasteful number, since it uses less digits than its factorization.

222618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389.

The product of its digits is 384, while the sum is 21.

The square root of 222618 is about 471.8241197735. The cubic root of 222618 is about 60.6066238988.

The spelling of 222618 in words is "two hundred twenty-two thousand, six hundred eighteen".