2143220441 has 4 divisors (see below), whose sum is σ = 2144661300. Its totient is φ = 2141779584.

The previous prime is 2143220423. The next prime is 2143220459. The reversal of 2143220441 is 1440223412.

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

It is an interprime number because it is at equal distance from previous prime (2143220423) and next prime (2143220459).

It can be written as a sum of positive squares in 2 ways, for example, as 653569225 + 1489651216 = 25565^2 + 38596^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143220441 - 2¹⁰ = 2143219417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2143220041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718196 + ... + 721173.

It is an arithmetic number, because the mean of its divisors is an integer number (536165325).

Almost surely, 2^2143220441 is an apocalyptic number.

It is an amenable number.

2143220441 is a deficient number, since it is larger than the sum of its proper divisors (1440859).

2143220441 is a wasteful number, since it uses less digits than its factorization.

2143220441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440858.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2143220441 is about 46294.9288907543. The cubic root of 2143220441 is about 1289.3048436969.

Adding to 2143220441 its reverse (1440223412), we get a palindrome (3583443853).

The spelling of 2143220441 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, four hundred forty-one".