3171881 has 2 divisors, whose sum is σ = 3171882. Its totient is φ = 3171880.

The previous prime is 3171869. The next prime is 3171893. The reversal of 3171881 is 1881713.

It is a balanced prime because it is at equal distance from previous prime (3171869) and next prime (3171893).

It can be written as a sum of positive squares in only one way, i.e., 3168400 + 3481 = 1780^2 + 59^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3171881 is a prime.

It is a super-2 number, since 2×3171881² = 20121658156322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3171811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585940 + 1585941.

It is an arithmetic number, because the mean of its divisors is an integer number (1585941).

Almost surely, 2^3171881 is an apocalyptic number.

It is an amenable number.

3171881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3171881 is an equidigital number, since it uses as much as digits as its factorization.

3171881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 3171881 is about 1780.9775405659. The cubic root of 3171881 is about 146.9283591246.

The spelling of 3171881 in words is "three million, one hundred seventy-one thousand, eight hundred eighty-one".