3131441381 has 2 divisors, whose sum is σ = 3131441382. Its totient is φ = 3131441380.

The previous prime is 3131441353. The next prime is 3131441389. The reversal of 3131441381 is 1831441313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2930056900 + 201384481 = 54130^2 + 14191^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131441381 - 2¹⁰ = 3131440357 is a prime.

It is a super-2 number, since 2×3131441381² = 19611850245278374322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131441389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565720690 + 1565720691.

It is an arithmetic number, because the mean of its divisors is an integer number (1565720691).

Almost surely, 2^3131441381 is an apocalyptic number.

It is an amenable number.

3131441381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131441381 is an equidigital number, since it uses as much as digits as its factorization.

3131441381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 3131441381 is about 55959.2832423719. The cubic root of 3131441381 is about 1463.0126977003.

Adding to 3131441381 its reverse (1831441313), we get a palindrome (4962882694).

The spelling of 3131441381 in words is "three billion, one hundred thirty-one million, four hundred forty-one thousand, three hundred eighty-one".