3191233081 has 9 divisors (see below), whose sum is σ = 3391015471. Its totient is φ = 3002609632.

The previous prime is 3191233063. The next prime is 3191233139. The reversal of 3191233081 is 1803321913.

The square root of 3191233081 is 56491.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2484524025 + 706709056 = 49845^2 + 26584^2 .

It is not a de Polignac number, because 3191233081 - 2¹³ = 3191224889 is a prime.

It is a super-2 number, since 2×3191233081² = 20367937154537505122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3191233021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 958686 + ... + 962008.

Almost surely, 2^3191233081 is an apocalyptic number.

3191233081 is the 56491-st square number.

3191233081 is the 28246-th centered octagonal number.

It is an amenable number.

3191233081 is a deficient number, since it is larger than the sum of its proper divisors (199782390).

3191233081 is an frugal number, since it uses more digits than its factorization.

3191233081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The cubic root of 3191233081 is about 1472.2656350578.

Adding to 3191233081 its reverse (1803321913), we get a palindrome (4994554994).

The spelling of 3191233081 in words is "three billion, one hundred ninety-one million, two hundred thirty-three thousand, eighty-one".