3081581138 has 8 divisors (see below), whose sum is σ = 4623034188. Its totient is φ = 1540569744.

The previous prime is 3081581119. The next prime is 3081581207. The reversal of 3081581138 is 8311851803.

It can be written as a sum of positive squares in 2 ways, for example, as 2256915049 + 824666089 = 47507^2 + 28717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3081581138² = 18992284620154750088, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 92381 + ... + 121232.

Almost surely, 2^3081581138 is an apocalyptic number.

3081581138 is a deficient number, since it is larger than the sum of its proper divisors (1541453050).

3081581138 is a wasteful number, since it uses less digits than its factorization.

3081581138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220828.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 3081581138 is about 55511.9909388954. The cubic root of 3081581138 is about 1455.2061977543.

The spelling of 3081581138 in words is "three billion, eighty-one million, five hundred eighty-one thousand, one hundred thirty-eight".