2143220405 has 16 divisors (see below), whose sum is σ = 2634375744. Its totient is φ = 1672984320.

The previous prime is 2143220393. The next prime is 2143220407. The reversal of 2143220405 is 5040223412.

It is a happy number.

It is not a de Polignac number, because 2143220405 - 2²² = 2139026101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143220407) 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 15 ways as a sum of consecutive naturals, for example, 229997 + ... + 239133.

It is an arithmetic number, because the mean of its divisors is an integer number (164648484).

Almost surely, 2^2143220405 is an apocalyptic number.

It is an amenable number.

2143220405 is a deficient number, since it is larger than the sum of its proper divisors (491155339).

2143220405 is a wasteful number, since it uses less digits than its factorization.

2143220405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2143220405 is about 46294.9285019428. The cubic root of 2143220405 is about 1289.3048364781.

Adding to 2143220405 its reverse (5040223412), we get a palindrome (7183443817).

The spelling of 2143220405 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, four hundred five".