2081443231 has 4 divisors (see below), whose sum is σ = 2378792272. Its totient is φ = 1784094192.

The previous prime is 2081443153. The next prime is 2081443237. The reversal of 2081443231 is 1323441802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2081443231 - 2¹⁹ = 2080918943 is a prime.

It is a super-2 number, since 2×2081443231² = 8664811847751438722, which contains 22 as substring.

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 2081443231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081443237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148674510 + ... + 148674523.

It is an arithmetic number, because the mean of its divisors is an integer number (594698068).

Almost surely, 2^2081443231 is an apocalyptic number.

2081443231 is a deficient number, since it is larger than the sum of its proper divisors (297349041).

2081443231 is an equidigital number, since it uses as much as digits as its factorization.

2081443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297349040.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2081443231 is about 45622.8367267972. The cubic root of 2081443231 is about 1276.7960295925.

The spelling of 2081443231 in words is "two billion, eighty-one million, four hundred forty-three thousand, two hundred thirty-one".