3113281 has 2 divisors, whose sum is σ = 3113282. Its totient is φ = 3113280.

The previous prime is 3113269. The next prime is 3113317. The reversal of 3113281 is 1823113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 341056 = 1665^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113281 - 2⁵ = 3113249 is a prime.

It is a super-2 number, since 2×3113281² = 19385037169922, which contains 22 as substring.

It is equal to p₂₂₄₃₈₀ and since 3113281 and 224380 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3113221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556640 + 1556641.

It is an arithmetic number, because the mean of its divisors is an integer number (1556641).

Almost surely, 2^3113281 is an apocalyptic number.

It is an amenable number.

3113281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113281 is an equidigital number, since it uses as much as digits as its factorization.

3113281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 3113281 is about 1764.4492058430. The cubic root of 3113281 is about 146.0179029775.

Adding to 3113281 its reverse (1823113), we get a palindrome (4936394).

It can be divided in two parts, 31132 and 81, that added together give a palindrome (31213).

The spelling of 3113281 in words is "three million, one hundred thirteen thousand, two hundred eighty-one".