331161143 has 2 divisors, whose sum is σ = 331161144. Its totient is φ = 331161142.

The previous prime is 331161133. The next prime is 331161151. The reversal of 331161143 is 341161133.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331161143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331161113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165580571 + 165580572.

It is an arithmetic number, because the mean of its divisors is an integer number (165580572).

Almost surely, 2^331161143 is an apocalyptic number.

331161143 is a deficient number, since it is larger than the sum of its proper divisors (1).

331161143 is an equidigital number, since it uses as much as digits as its factorization.

331161143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 331161143 is about 18197.8334699491. The cubic root of 331161143 is about 691.8518782338.

The spelling of 331161143 in words is "three hundred thirty-one million, one hundred sixty-one thousand, one hundred forty-three".