1223543553 has 16 divisors (see below), whose sum is σ = 1690286400. Its totient is φ = 786336320.

The previous prime is 1223543539. The next prime is 1223543579. The reversal of 1223543553 is 3553453221.

It is a cyclic number.

It is not a de Polignac number, because 1223543553 - 2²² = 1219349249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223543653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46663 + ... + 68003.

It is an arithmetic number, because the mean of its divisors is an integer number (105642900).

Almost surely, 2^1223543553 is an apocalyptic number.

It is an amenable number.

1223543553 is a deficient number, since it is larger than the sum of its proper divisors (466742847).

1223543553 is a wasteful number, since it uses less digits than its factorization.

1223543553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032.

The product of its digits is 54000, while the sum is 33.

The square root of 1223543553 is about 34979.1874262396. The cubic root of 1223543553 is about 1069.5632634034.

Adding to 1223543553 its reverse (3553453221), we get a palindrome (4776996774).

The spelling of 1223543553 in words is "one billion, two hundred twenty-three million, five hundred forty-three thousand, five hundred fifty-three".