2123605443 has 8 divisors (see below), whose sum is σ = 2851844800. Its totient is φ = 1405551528.

The previous prime is 2123605427. The next prime is 2123605457. The reversal of 2123605443 is 3445063212.

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

It is not a de Polignac number, because 2123605443 - 2⁴ = 2123605427 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 2123605443.

It is not an unprimeable number, because it can be changed into a prime (2123605483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2545873 + ... + 2546706.

It is an arithmetic number, because the mean of its divisors is an integer number (356480600).

Almost surely, 2^2123605443 is an apocalyptic number.

2123605443 is a deficient number, since it is larger than the sum of its proper divisors (728239357).

2123605443 is a wasteful number, since it uses less digits than its factorization.

2123605443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092721.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 2123605443 is about 46082.5937095559. The cubic root of 2123605443 is about 1285.3594946675.

Adding to 2123605443 its reverse (3445063212), we get a palindrome (5568668655).

The spelling of 2123605443 in words is "two billion, one hundred twenty-three million, six hundred five thousand, four hundred forty-three".