1553323723 has 16 divisors (see below), whose sum is σ = 1850492160. Its totient is φ = 1275674400.

The previous prime is 1553323721. The next prime is 1553323747. The reversal of 1553323723 is 3273233551.

It is not a de Polignac number, because 1553323723 - 2¹ = 1553323721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553323721) 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, 2613 + ... + 55798.

It is an arithmetic number, because the mean of its divisors is an integer number (115655760).

Almost surely, 2^1553323723 is an apocalyptic number.

1553323723 is a deficient number, since it is larger than the sum of its proper divisors (297168437).

1553323723 is a wasteful number, since it uses less digits than its factorization.

1553323723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58578.

The product of its digits is 56700, while the sum is 34.

The square root of 1553323723 is about 39412.2280897693. The cubic root of 1553323723 is about 1158.1211466805.

The spelling of 1553323723 in words is "one billion, five hundred fifty-three million, three hundred twenty-three thousand, seven hundred twenty-three".