222222155 has 8 divisors (see below), whose sum is σ = 266799984. Its totient is φ = 177688800.

The previous prime is 222222149. The next prime is 222222193. The reversal of 222222155 is 551222222.

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

It is not a de Polignac number, because 222222155 - 2⁴ = 222222139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222222155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100 + ... + 21110.

It is an arithmetic number, because the mean of its divisors is an integer number (33349998).

Almost surely, 2^222222155 is an apocalyptic number.

222222155 is a deficient number, since it is larger than the sum of its proper divisors (44577829).

222222155 is a wasteful number, since it uses less digits than its factorization.

222222155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22237.

The product of its digits is 1600, while the sum is 23.

The square root of 222222155 is about 14907.1175952966. The cubic root of 222222155 is about 605.7068032019.

Adding to 222222155 its reverse (551222222), we get a palindrome (773444377).

The spelling of 222222155 in words is "two hundred twenty-two million, two hundred twenty-two thousand, one hundred fifty-five".