2144243021 has 8 divisors (see below), whose sum is σ = 2150910720. Its totient is φ = 2137585408.

The previous prime is 2144242987. The next prime is 2144243027. The reversal of 2144243021 is 1203424412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2144243021 - 2⁶ = 2144242957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144243027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681965 + ... + 685101.

It is an arithmetic number, because the mean of its divisors is an integer number (268863840).

Almost surely, 2^2144243021 is an apocalyptic number.

It is an amenable number.

2144243021 is a deficient number, since it is larger than the sum of its proper divisors (6667699).

2144243021 is a wasteful number, since it uses less digits than its factorization.

2144243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2144243021 is about 46305.9717639097. The cubic root of 2144243021 is about 1289.5098634723.

Adding to 2144243021 its reverse (1203424412), we get a palindrome (3347667433).

The spelling of 2144243021 in words is "two billion, one hundred forty-four million, two hundred forty-three thousand, twenty-one".