3181331 has 2 divisors, whose sum is σ = 3181332. Its totient is φ = 3181330.

The previous prime is 3181327. The next prime is 3181349. The reversal of 3181331 is 1331813.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3181331 - 2² = 3181327 is a prime.

It is a super-2 number, since 2×3181331² = 20241733863122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3181301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1590665 + 1590666.

It is an arithmetic number, because the mean of its divisors is an integer number (1590666).

Almost surely, 2^3181331 is an apocalyptic number.

3181331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3181331 is an equidigital number, since it uses as much as digits as its factorization.

3181331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 3181331 is about 1783.6286048390. The cubic root of 3181331 is about 147.0741292399.

The spelling of 3181331 in words is "three million, one hundred eighty-one thousand, three hundred thirty-one".