2143440311 has 16 divisors (see below), whose sum is σ = 2309990400. Its totient is φ = 1983989568.

The previous prime is 2143440287. The next prime is 2143440329. The reversal of 2143440311 is 1130443412.

It is not a de Polignac number, because 2143440311 - 2¹⁴ = 2143423927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143440361) 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, 85070 + ... + 107348.

It is an arithmetic number, because the mean of its divisors is an integer number (144374400).

Almost surely, 2^2143440311 is an apocalyptic number.

2143440311 is a deficient number, since it is larger than the sum of its proper divisors (166550089).

2143440311 is a wasteful number, since it uses less digits than its factorization.

2143440311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22438.

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

The square root of 2143440311 is about 46297.3034959921. The cubic root of 2143440311 is about 1289.3489315187.

Adding to 2143440311 its reverse (1130443412), we get a palindrome (3273883723).

The spelling of 2143440311 in words is "two billion, one hundred forty-three million, four hundred forty thousand, three hundred eleven".