12229155 has 24 divisors (see below), whose sum is σ = 21930480. Its totient is φ = 6296640.

The previous prime is 12229153. The next prime is 12229177. The reversal of 12229155 is 55192221.

12229155 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 12229155 - 2¹ = 12229153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12229153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3381 + ... + 5990.

It is an arithmetic number, because the mean of its divisors is an integer number (913770).

Almost surely, 2^12229155 is an apocalyptic number.

12229155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12229155 is a deficient number, since it is larger than the sum of its proper divisors (9701325).

12229155 is a wasteful number, since it uses less digits than its factorization.

12229155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411 (or 9408 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12229155 is about 3497.0208749734. The cubic root of 12229155 is about 230.3909858850.

The spelling of 12229155 in words is "twelve million, two hundred twenty-nine thousand, one hundred fifty-five".