2130440243 has 4 divisors (see below), whose sum is σ = 2131223640. Its totient is φ = 2129656848.

The previous prime is 2130440233. The next prime is 2130440267. The reversal of 2130440243 is 3420440312.

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 2130440243 - 2²⁶ = 2063331379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2130440233) 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, 387605 + ... + 393062.

It is an arithmetic number, because the mean of its divisors is an integer number (532805910).

Almost surely, 2^2130440243 is an apocalyptic number.

2130440243 is a deficient number, since it is larger than the sum of its proper divisors (783397).

2130440243 is an equidigital number, since it uses as much as digits as its factorization.

2130440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783396.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2130440243 is about 46156.6922883345. The cubic root of 2130440243 is about 1286.7369895507.

Adding to 2130440243 its reverse (3420440312), we get a palindrome (5550880555).

The spelling of 2130440243 in words is "two billion, one hundred thirty million, four hundred forty thousand, two hundred forty-three".