1223235556 has 24 divisors (see below), whose sum is σ = 2177261856. Its totient is φ = 601248960.

The previous prime is 1223235551. The next prime is 1223235571. The reversal of 1223235556 is 6555323221.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1223235551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45160 + ... + 66976.

It is an arithmetic number, because the mean of its divisors is an integer number (90719244).

Almost surely, 2^1223235556 is an apocalyptic number.

It is an amenable number.

1223235556 is a deficient number, since it is larger than the sum of its proper divisors (954026300).

1223235556 is a wasteful number, since it uses less digits than its factorization.

1223235556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22059 (or 22057 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

The square root of 1223235556 is about 34974.7845740328. The cubic root of 1223235556 is about 1069.4735104557.

Adding to 1223235556 its reverse (6555323221), we get a palindrome (7778558777).

The spelling of 1223235556 in words is "one billion, two hundred twenty-three million, two hundred thirty-five thousand, five hundred fifty-six".