222399 has 8 divisors (see below), whose sum is σ = 329520. Its totient is φ = 148248.

The previous prime is 222389. The next prime is 222403. The reversal of 222399 is 993222.

It is not a de Polignac number, because 222399 - 2⁵ = 222367 is a prime.

It is a super-2 number, since 2×222399² = 98922630402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8237 = 222399 / (2 + 2 + 2 + 3 + 9 + 9).

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222329) 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, 4092 + ... + 4145.

It is an arithmetic number, because the mean of its divisors is an integer number (41190).

2²²²³⁹⁹ is an apocalyptic number.

222399 is a deficient number, since it is larger than the sum of its proper divisors (107121).

222399 is an equidigital number, since it uses as much as digits as its factorization.

222399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8246 (or 8240 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 222399 is about 471.5919846647. The cubic root of 222399 is about 60.5867434977.

The spelling of 222399 in words is "two hundred twenty-two thousand, three hundred ninety-nine".