12331155 has 16 divisors (see below), whose sum is σ = 20150784. Its totient is φ = 6436320.

The previous prime is 12331147. The next prime is 12331157. The reversal of 12331155 is 55113321.

It is not a de Polignac number, because 12331155 - 2³ = 12331147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12331157) 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 15 ways as a sum of consecutive naturals, for example, 8041 + ... + 9450.

It is an arithmetic number, because the mean of its divisors is an integer number (1259424).

Almost surely, 2^12331155 is an apocalyptic number.

12331155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12331155 is a deficient number, since it is larger than the sum of its proper divisors (7819629).

12331155 is a wasteful number, since it uses less digits than its factorization.

12331155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17546.

The product of its digits is 450, while the sum is 21.

The square root of 12331155 is about 3511.5744332137. The cubic root of 12331155 is about 231.0297557291.

Adding to 12331155 its reverse (55113321), we get a palindrome (67444476).

The spelling of 12331155 in words is "twelve million, three hundred thirty-one thousand, one hundred fifty-five".