2143240115 has 4 divisors (see below), whose sum is σ = 2571888144. Its totient is φ = 1714592088.

The previous prime is 2143240111. The next prime is 2143240117. The reversal of 2143240115 is 5110423412.

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 2143240115 - 2² = 2143240111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143240111) 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, 214324007 + ... + 214324016.

It is an arithmetic number, because the mean of its divisors is an integer number (642972036).

Almost surely, 2^2143240115 is an apocalyptic number.

2143240115 is a deficient number, since it is larger than the sum of its proper divisors (428648029).

2143240115 is an equidigital number, since it uses as much as digits as its factorization.

2143240115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428648028.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2143240115 is about 46295.1413757427. The cubic root of 2143240115 is about 1289.3087888046.

Adding to 2143240115 its reverse (5110423412), we get a palindrome (7253663527).

The spelling of 2143240115 in words is "two billion, one hundred forty-three million, two hundred forty thousand, one hundred fifteen".