2021231839 has 8 divisors (see below), whose sum is σ = 2207152080. Its totient is φ = 1835673600.

The previous prime is 2021231759. The next prime is 2021231917. The reversal of 2021231839 is 9381321202.

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 2021231839 - 2²⁷ = 1887014111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021231839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021232839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78754 + ... + 101215.

It is an arithmetic number, because the mean of its divisors is an integer number (275894010).

Almost surely, 2^2021231839 is an apocalyptic number.

2021231839 is a deficient number, since it is larger than the sum of its proper divisors (185920241).

2021231839 is a wasteful number, since it uses less digits than its factorization.

2021231839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181001.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2021231839 is about 44958.1120488839. The cubic root of 2021231839 is about 1264.3637724062.

The spelling of 2021231839 in words is "two billion, twenty-one million, two hundred thirty-one thousand, eight hundred thirty-nine".