222669 has 10 divisors (see below), whose sum is σ = 332750. Its totient is φ = 148392.

The previous prime is 222659. The next prime is 222679. The reversal of 222669 is 966222.

It is an interprime number because it is at equal distance from previous prime (222659) and next prime (222679).

It can be written as a sum of positive squares in only one way, i.e., 149769 + 72900 = 387^2 + 270^2 .

It is not a de Polignac number, because 222669 - 2¹⁵ = 189901 is a prime.

It is a super-2 number, since 2×222669² = 99162967122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1294 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (33275).

2²²²⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

222669 is a deficient number, since it is larger than the sum of its proper divisors (110081).

222669 is an equidigital number, since it uses as much as digits as its factorization.

222669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761 (or 2752 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 222669 is about 471.8781622411. The cubic root of 222669 is about 60.6112517094.

The spelling of 222669 in words is "two hundred twenty-two thousand, six hundred sixty-nine".