2143100405 has 4 divisors (see below), whose sum is σ = 2571720492. Its totient is φ = 1714480320.

The previous prime is 2143100369. The next prime is 2143100431. The reversal of 2143100405 is 5040013412.

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 1343002609 + 800097796 = 36647^2 + 28286^2 .

It is not a de Polignac number, because 2143100405 - 2⁶ = 2143100341 is a prime.

It is a super-2 number, since 2×2143100405² = 9185758691822328050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 214310036 + ... + 214310045.

It is an arithmetic number, because the mean of its divisors is an integer number (642930123).

Almost surely, 2^2143100405 is an apocalyptic number.

It is an amenable number.

2143100405 is a deficient number, since it is larger than the sum of its proper divisors (428620087).

2143100405 is an equidigital number, since it uses as much as digits as its factorization.

2143100405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428620086.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2143100405 is about 46293.6324455103. The cubic root of 2143100405 is about 1289.2807730845.

Adding to 2143100405 its reverse (5040013412), we get a palindrome (7183113817).

The spelling of 2143100405 in words is "two billion, one hundred forty-three million, one hundred thousand, four hundred five".