1553505323 has 4 divisors (see below), whose sum is σ = 1553639568. Its totient is φ = 1553371080.

The previous prime is 1553505311. The next prime is 1553505337. The reversal of 1553505323 is 3235053551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1553505323 - 2¹⁰ = 1553504299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553505323.

It is not an unprimeable number, because it can be changed into a prime (1553505383) 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, 47936 + ... + 73517.

It is an arithmetic number, because the mean of its divisors is an integer number (388409892).

Almost surely, 2^1553505323 is an apocalyptic number.

1553505323 is a deficient number, since it is larger than the sum of its proper divisors (134245).

1553505323 is a wasteful number, since it uses less digits than its factorization.

1553505323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134244.

The product of its (nonzero) digits is 33750, while the sum is 32.

The square root of 1553505323 is about 39414.5318759465. The cubic root of 1553505323 is about 1158.1662771325.

Adding to 1553505323 its reverse (3235053551), we get a palindrome (4788558874).

The spelling of 1553505323 in words is "one billion, five hundred fifty-three million, five hundred five thousand, three hundred twenty-three".