12223155 has 16 divisors (see below), whose sum is σ = 22351104. Its totient is φ = 5587680.

The previous prime is 12223139. The next prime is 12223199. The reversal of 12223155 is 55132221.

12223155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12223155 - 2⁴ = 12223139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58101 + ... + 58310.

It is an arithmetic number, because the mean of its divisors is an integer number (1396944).

Almost surely, 2^12223155 is an apocalyptic number.

12223155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12223155 is a deficient number, since it is larger than the sum of its proper divisors (10127949).

12223155 is a wasteful number, since it uses less digits than its factorization.

12223155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116426.

The product of its digits is 600, while the sum is 21.

The square root of 12223155 is about 3496.1628966626. The cubic root of 12223155 is about 230.3533007506.

Adding to 12223155 its reverse (55132221), we get a palindrome (67355376).

The spelling of 12223155 in words is "twelve million, two hundred twenty-three thousand, one hundred fifty-five".