3881334581 has 2 divisors, whose sum is σ = 3881334582. Its totient is φ = 3881334580.

The previous prime is 3881334559. The next prime is 3881334601. The reversal of 3881334581 is 1854331883.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3689955025 + 191379556 = 60745^2 + 13834^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881334581 - 2⁶ = 3881334517 is a prime.

It is a super-2 number, since 2×3881334581² = 30129516259332891122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3881334551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940667290 + 1940667291.

It is an arithmetic number, because the mean of its divisors is an integer number (1940667291).

Almost surely, 2^3881334581 is an apocalyptic number.

It is an amenable number.

3881334581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881334581 is an equidigital number, since it uses as much as digits as its factorization.

3881334581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 3881334581 is about 62300.3577919100. The cubic root of 3881334581 is about 1571.5457454079.

The spelling of 3881334581 in words is "three billion, eight hundred eighty-one million, three hundred thirty-four thousand, five hundred eighty-one".