2081231810 has 32 divisors (see below), whose sum is σ = 4419505152. Its totient is φ = 690546240.

The previous prime is 2081231809. The next prime is 2081231813. The reversal of 2081231810 is 181321802.

It is a super-2 number, since 2×2081231810² = 8663051693911752200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2081231810.

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 15 ways as a sum of consecutive naturals, for example, 477377 + ... + 481716.

It is an arithmetic number, because the mean of its divisors is an integer number (138109536).

Almost surely, 2^2081231810 is an apocalyptic number.

2081231810 is an abundant number, since it is smaller than the sum of its proper divisors (2338273342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2081231810 is a wasteful number, since it uses less digits than its factorization.

2081231810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959138.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2081231810 is about 45620.5196156291. The cubic root of 2081231810 is about 1276.7527982695.

The spelling of 2081231810 in words is "two billion, eighty-one million, two hundred thirty-one thousand, eight hundred ten".