1223343553 has 4 divisors (see below), whose sum is σ = 1241602480. Its totient is φ = 1205084628.

The previous prime is 1223343523. The next prime is 1223343559. The reversal of 1223343553 is 3553433221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3553433221 = 13 ⋅273341017.

It is a cyclic number.

It is not a de Polignac number, because 1223343553 - 2⁵ = 1223343521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223343559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9129363 + ... + 9129496.

It is an arithmetic number, because the mean of its divisors is an integer number (310400620).

Almost surely, 2^1223343553 is an apocalyptic number.

It is an amenable number.

1223343553 is a deficient number, since it is larger than the sum of its proper divisors (18258927).

1223343553 is an equidigital number, since it uses as much as digits as its factorization.

1223343553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18258926.

The product of its digits is 32400, while the sum is 31.

The square root of 1223343553 is about 34976.3284665501. The cubic root of 1223343553 is about 1069.5049834158.

Adding to 1223343553 its reverse (3553433221), we get a palindrome (4776776774).

The spelling of 1223343553 in words is "one billion, two hundred twenty-three million, three hundred forty-three thousand, five hundred fifty-three".