2145440323 has 8 divisors (see below), whose sum is σ = 2364206768. Its totient is φ = 1934349984.

The previous prime is 2145440291. The next prime is 2145440327. The reversal of 2145440323 is 3230445412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145440323 - 2⁵ = 2145440291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145440291 and 2145440300.

It is not an unprimeable number, because it can be changed into a prime (2145440327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1918440 + ... + 1919557.

It is an arithmetic number, because the mean of its divisors is an integer number (295525846).

Almost surely, 2^2145440323 is an apocalyptic number.

2145440323 is a deficient number, since it is larger than the sum of its proper divisors (218766445).

2145440323 is a wasteful number, since it uses less digits than its factorization.

2145440323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838053.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2145440323 is about 46318.8981194501. The cubic root of 2145440323 is about 1289.7498309023.

Adding to 2145440323 its reverse (3230445412), we get a palindrome (5375885735).

The spelling of 2145440323 in words is "two billion, one hundred forty-five million, four hundred forty thousand, three hundred twenty-three".