2142311243 has 4 divisors (see below), whose sum is σ = 2142720528. Its totient is φ = 2141901960.

The previous prime is 2142311207. The next prime is 2142311263. The reversal of 2142311243 is 3421132412.

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 2142311243 - 2⁸ = 2142310987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142311263) 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, 196688 + ... + 207293.

It is an arithmetic number, because the mean of its divisors is an integer number (535680132).

Almost surely, 2^2142311243 is an apocalyptic number.

2142311243 is a deficient number, since it is larger than the sum of its proper divisors (409285).

2142311243 is an equidigital number, since it uses as much as digits as its factorization.

2142311243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409284.

The product of its digits is 1152, while the sum is 23.

The square root of 2142311243 is about 46285.1082206794. The cubic root of 2142311243 is about 1289.1225014044.

Adding to 2142311243 its reverse (3421132412), we get a palindrome (5563443655).

The spelling of 2142311243 in words is "two billion, one hundred forty-two million, three hundred eleven thousand, two hundred forty-three".