3438221581 has 2 divisors, whose sum is σ = 3438221582. Its totient is φ = 3438221580.

The previous prime is 3438221569. The next prime is 3438221603. The reversal of 3438221581 is 1851228343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3437945956 + 275625 = 58634^2 + 525^2 .

It is an emirp because it is prime and its reverse (1851228343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3438221581 - 2⁷ = 3438221453 is a prime.

It is a super-2 number, since 2×3438221581² = 23642735280108279122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3438221581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3438221981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719110790 + 1719110791.

It is an arithmetic number, because the mean of its divisors is an integer number (1719110791).

Almost surely, 2^3438221581 is an apocalyptic number.

It is an amenable number.

3438221581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3438221581 is an equidigital number, since it uses as much as digits as its factorization.

3438221581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 3438221581 is about 58636.3503383353. The cubic root of 3438221581 is about 1509.3082779731.

The spelling of 3438221581 in words is "three billion, four hundred thirty-eight million, two hundred twenty-one thousand, five hundred eighty-one".