1553011223 has 4 divisors (see below), whose sum is σ = 1556598288. Its totient is φ = 1549424160.

The previous prime is 1553011211. The next prime is 1553011231. The reversal of 1553011223 is 3221103551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221103551 = 2663 ⋅1209577.

It is a cyclic number.

It is not a de Polignac number, because 1553011223 - 2⁸ = 1553010967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553011283) 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 3 ways as a sum of consecutive naturals, for example, 1792883 + ... + 1793748.

It is an arithmetic number, because the mean of its divisors is an integer number (389149572).

Almost surely, 2^1553011223 is an apocalyptic number.

1553011223 is a deficient number, since it is larger than the sum of its proper divisors (3587065).

1553011223 is an equidigital number, since it uses as much as digits as its factorization.

1553011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587064.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1553011223 is about 39408.2633847268. The cubic root of 1553011223 is about 1158.0434772878.

Adding to 1553011223 its reverse (3221103551), we get a palindrome (4774114774).

The spelling of 1553011223 in words is "one billion, five hundred fifty-three million, eleven thousand, two hundred twenty-three".