12219155 has 8 divisors (see below), whose sum is σ = 15790992. Its totient is φ = 9023328.

The previous prime is 12219133. The next prime is 12219157. The reversal of 12219155 is 55191221.

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

It is a cyclic number.

It is not a de Polignac number, because 12219155 - 2¹⁶ = 12153619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12219157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93929 + ... + 94058.

It is an arithmetic number, because the mean of its divisors is an integer number (1973874).

Almost surely, 2^12219155 is an apocalyptic number.

12219155 is a deficient number, since it is larger than the sum of its proper divisors (3571837).

12219155 is a wasteful number, since it uses less digits than its factorization.

12219155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188005.

The product of its digits is 900, while the sum is 26.

The square root of 12219155 is about 3495.5907941291. The cubic root of 12219155 is about 230.3281704758.

The spelling of 12219155 in words is "twelve million, two hundred nineteen thousand, one hundred fifty-five".