2081831 has 2 divisors, whose sum is σ = 2081832. Its totient is φ = 2081830.

The previous prime is 2081813. The next prime is 2081843. The reversal of 2081831 is 1381802.

Together with previous prime (2081813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2081831 - 2¹⁰ = 2080807 is a prime.

It is a super-2 number, since 2×2081831² = 8668040625122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2081797 and 2081806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040915 + 1040916.

It is an arithmetic number, because the mean of its divisors is an integer number (1040916).

2^2081831 is an apocalyptic number.

2081831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081831 is an equidigital number, since it uses as much as digits as its factorization.

2081831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2081831 is about 1442.8551555856. The cubic root of 2081831 is about 127.6875312911.

The spelling of 2081831 in words is "two million, eighty-one thousand, eight hundred thirty-one".