3081581139 has 48 divisors (see below), whose sum is σ = 5418228480. Its totient is φ = 1539881280.

The previous prime is 3081581119. The next prime is 3081581207. The reversal of 3081581139 is 9311851803.

It is not a de Polignac number, because 3081581139 - 2¹¹ = 3081579091 is a prime.

It is a super-2 number, since 2×3081581139² = 18992284632481074642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 3081581097 and 3081581106.

It is not an unprimeable number, because it can be changed into a prime (3081581119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6127 + ... + 78744.

It is an arithmetic number, because the mean of its divisors is an integer number (112879760).

Almost surely, 2^3081581139 is an apocalyptic number.

3081581139 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3081581139 is a deficient number, since it is larger than the sum of its proper divisors (2336647341).

3081581139 is a wasteful number, since it uses less digits than its factorization.

3081581139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84920 (or 84913 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 3081581139 is about 55511.9909479024. The cubic root of 3081581139 is about 1455.2061979117.

The spelling of 3081581139 in words is "three billion, eighty-one million, five hundred eighty-one thousand, one hundred thirty-nine".