2111444345 has 4 divisors (see below), whose sum is σ = 2533733220. Its totient is φ = 1689155472.

The previous prime is 2111444339. The next prime is 2111444347. The reversal of 2111444345 is 5434441112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1652585104 + 458859241 = 40652^2 + 21421^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111444345 - 2⁴ = 2111444329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111444347) 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 3 ways as a sum of consecutive naturals, for example, 211144430 + ... + 211144439.

It is an arithmetic number, because the mean of its divisors is an integer number (633433305).

Almost surely, 2^2111444345 is an apocalyptic number.

It is an amenable number.

2111444345 is a deficient number, since it is larger than the sum of its proper divisors (422288875).

2111444345 is an equidigital number, since it uses as much as digits as its factorization.

2111444345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422288874.

The product of its digits is 7680, while the sum is 29.

The square root of 2111444345 is about 45950.4553296265. The cubic root of 2111444345 is about 1282.9012042954.

Adding to 2111444345 its reverse (5434441112), we get a palindrome (7545885457).

The spelling of 2111444345 in words is "two billion, one hundred eleven million, four hundred forty-four thousand, three hundred forty-five".