2143240135 has 4 divisors (see below), whose sum is σ = 2571888168. Its totient is φ = 1714592104.

The previous prime is 2143240117. The next prime is 2143240241. The reversal of 2143240135 is 5310423412.

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

It is a cyclic number.

It is not a de Polignac number, because 2143240135 - 2⁷ = 2143240007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214324009 + ... + 214324018.

It is an arithmetic number, because the mean of its divisors is an integer number (642972042).

Almost surely, 2^2143240135 is an apocalyptic number.

2143240135 is a deficient number, since it is larger than the sum of its proper divisors (428648033).

2143240135 is an equidigital number, since it uses as much as digits as its factorization.

2143240135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428648032.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2143240135 is about 46295.1415917480. The cubic root of 2143240135 is about 1289.3087928150.

Adding to 2143240135 its reverse (5310423412), we get a palindrome (7453663547).

The spelling of 2143240135 in words is "two billion, one hundred forty-three million, two hundred forty thousand, one hundred thirty-five".