2143240133 has 16 divisors (see below), whose sum is σ = 2339249904. Its totient is φ = 1955404800.

The previous prime is 2143240117. The next prime is 2143240241. The reversal of 2143240133 is 3310423412.

It can be written as a sum of positive squares in 8 ways, for example, as 31561924 + 2111678209 = 5618^2 + 45953^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143240133 - 2⁴ = 2143240117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143240099 and 2143240108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143240433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168083 + ... + 180383.

It is an arithmetic number, because the mean of its divisors is an integer number (146203119).

Almost surely, 2^2143240133 is an apocalyptic number.

It is an amenable number.

2143240133 is a deficient number, since it is larger than the sum of its proper divisors (196009771).

2143240133 is a wasteful number, since it uses less digits than its factorization.

2143240133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12632.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2143240133 is about 46295.1415701475. The cubic root of 2143240133 is about 1289.3087924140.

Adding to 2143240133 its reverse (3310423412), we get a palindrome (5453663545).

The spelling of 2143240133 in words is "two billion, one hundred forty-three million, two hundred forty thousand, one hundred thirty-three".