3131001331 has 2 divisors, whose sum is σ = 3131001332. Its totient is φ = 3131001330.

The previous prime is 3131001329. The next prime is 3131001343. The reversal of 3131001331 is 1331001313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131001331 - 2¹ = 3131001329 is a prime.

It is a super-2 number, since 2×3131001331² = 19606338669447543122, which contains 22 as substring.

Together with 3131001329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3131001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565500665 + 1565500666.

It is an arithmetic number, because the mean of its divisors is an integer number (1565500666).

Almost surely, 2^3131001331 is an apocalyptic number.

3131001331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131001331 is an equidigital number, since it uses as much as digits as its factorization.

3131001331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 3131001331 is about 55955.3512275636. The cubic root of 3131001331 is about 1462.9441638828.

Adding to 3131001331 its reverse (1331001313), we get a palindrome (4462002644).

The spelling of 3131001331 in words is "three billion, one hundred thirty-one million, one thousand, three hundred thirty-one".