3131313081 has 16 divisors (see below), whose sum is σ = 4691734656. Its totient is φ = 1843180416.

The previous prime is 3131313041. The next prime is 3131313109. The reversal of 3131313081 is 1803131313.

3131313081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3131313081 - 2⁷ = 3131312953 is a prime.

It is a super-2 number, since 2×3131313081² = 19610243222483425122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3131313041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1744540 + ... + 1746333.

It is an arithmetic number, because the mean of its divisors is an integer number (293233416).

Almost surely, 2^3131313081 is an apocalyptic number.

It is an amenable number.

3131313081 is a deficient number, since it is larger than the sum of its proper divisors (1560421575).

3131313081 is a wasteful number, since it uses less digits than its factorization.

3131313081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490912.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 3131313081 is about 55958.1368614074. The cubic root of 3131313081 is about 1462.9927167959.

Adding to 3131313081 its reverse (1803131313), we get a palindrome (4934444394).

The spelling of 3131313081 in words is "three billion, one hundred thirty-one million, three hundred thirteen thousand, eighty-one".