2145443052241 has 4 divisors (see below), whose sum is σ = 2145446268084. Its totient is φ = 2145439836400.

The previous prime is 2145443052199. The next prime is 2145443052251. The reversal of 2145443052241 is 1422503445412.

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 1037678382225 + 1107764670016 = 1018665^2 + 1052504^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145443052241 - 2⁷ = 2145443052113 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 2145443052241.

It is not an unprimeable number, because it can be changed into a prime (2145443052251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190990 + ... + 2080231.

It is an arithmetic number, because the mean of its divisors is an integer number (536361567021).

Almost surely, 2^{2145443052241} is an apocalyptic number.

It is an amenable number.

2145443052241 is a deficient number, since it is larger than the sum of its proper divisors (3215843).

2145443052241 is an equidigital number, since it uses as much as digits as its factorization.

2145443052241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215842.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 2145443052241 its reverse (1422503445412), we get a palindrome (3567946497653).

The spelling of 2145443052241 in words is "two trillion, one hundred forty-five billion, four hundred forty-three million, fifty-two thousand, two hundred forty-one".