2145440343 has 8 divisors (see below), whose sum is σ = 2952864256. Its totient is φ = 1384155000.

The previous prime is 2145440327. The next prime is 2145440377. The reversal of 2145440343 is 3430445412.

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

It is not a de Polignac number, because 2145440343 - 2⁴ = 2145440327 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 2145440343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145440243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11534533 + ... + 11534718.

It is an arithmetic number, because the mean of its divisors is an integer number (369108032).

Almost surely, 2^2145440343 is an apocalyptic number.

2145440343 is a deficient number, since it is larger than the sum of its proper divisors (807423913).

2145440343 is a wasteful number, since it uses less digits than its factorization.

2145440343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23069285.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 2145440343 is about 46318.8983353447. The cubic root of 2145440343 is about 1289.7498349100.

Adding to 2145440343 its reverse (3430445412), we get a palindrome (5575885755).

The spelling of 2145440343 in words is "two billion, one hundred forty-five million, four hundred forty thousand, three hundred forty-three".