3231131381 has 2 divisors, whose sum is σ = 3231131382. Its totient is φ = 3231131380.

The previous prime is 3231131377. The next prime is 3231131441. The reversal of 3231131381 is 1831311323.

3231131381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3004026481 + 227104900 = 54809^2 + 15070^2 .

It is an emirp because it is prime and its reverse (1831311323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3231131381 - 2² = 3231131377 is a prime.

It is a super-2 number, since 2×3231131381² = 20880420002565934322, 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 3231131381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3231131341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615565690 + 1615565691.

It is an arithmetic number, because the mean of its divisors is an integer number (1615565691).

Almost surely, 2^3231131381 is an apocalyptic number.

It is an amenable number.

3231131381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231131381 is an equidigital number, since it uses as much as digits as its factorization.

3231131381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 3231131381 is about 56843.0416234037. The cubic root of 3231131381 is about 1478.3758938708.

The spelling of 3231131381 in words is "three billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred eighty-one".