2081231811 has 12 divisors (see below), whose sum is σ = 3006665688. Its totient is φ = 1387283904.

The previous prime is 2081231809. The next prime is 2081231813. The reversal of 2081231811 is 1181321802.

It is an interprime number because it is at equal distance from previous prime (2081231809) and next prime (2081231813).

It is not a de Polignac number, because 2081231811 - 2¹ = 2081231809 is a prime.

It is a super-2 number, since 2×2081231811² = 8663051702236679442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2081231813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72331 + ... + 96923.

It is an arithmetic number, because the mean of its divisors is an integer number (250555474).

Almost surely, 2^2081231811 is an apocalyptic number.

2081231811 is a deficient number, since it is larger than the sum of its proper divisors (925433877).

2081231811 is a wasteful number, since it uses less digits than its factorization.

2081231811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34002 (or 33999 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 2081231811 is about 45620.5196265891. The cubic root of 2081231811 is about 1276.7527984740.

The spelling of 2081231811 in words is "two billion, eighty-one million, two hundred thirty-one thousand, eight hundred eleven".