2143043511 has 32 divisors (see below), whose sum is σ = 3464068608. Its totient is φ = 1150433280.

The previous prime is 2143043509. The next prime is 2143043557. The reversal of 2143043511 is 1153403412.

It is a happy number.

It is not a de Polignac number, because 2143043511 - 2¹ = 2143043509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143043501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198591 + ... + 209103.

It is an arithmetic number, because the mean of its divisors is an integer number (108252144).

Almost surely, 2^2143043511 is an apocalyptic number.

2143043511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2143043511 is a deficient number, since it is larger than the sum of its proper divisors (1321025097).

2143043511 is a wasteful number, since it uses less digits than its factorization.

2143043511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2143043511 is about 46293.0179508746. The cubic root of 2143043511 is about 1289.2693639147.

Adding to 2143043511 its reverse (1153403412), we get a palindrome (3296446923).

The spelling of 2143043511 in words is "two billion, one hundred forty-three million, forty-three thousand, five hundred eleven".