12223144 has 8 divisors (see below), whose sum is σ = 22918410. Its totient is φ = 6111568.

The previous prime is 12223139. The next prime is 12223199. The reversal of 12223144 is 44132221.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 1790244 = 3230^2 + 1338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763939 + ... + 763954.

Almost surely, 2^12223144 is an apocalyptic number.

It is an amenable number.

12223144 is a deficient number, since it is larger than the sum of its proper divisors (10695266).

12223144 is a wasteful number, since it uses less digits than its factorization.

12223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527899 (or 1527895 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 12223144 is about 3496.1613235090. The cubic root of 12223144 is about 230.3532316499.

Adding to 12223144 its reverse (44132221), we get a palindrome (56355365).

The spelling of 12223144 in words is "twelve million, two hundred twenty-three thousand, one hundred forty-four".