331943 has 2 divisors, whose sum is σ = 331944. Its totient is φ = 331942.

The previous prime is 331937. The next prime is 331957. The reversal of 331943 is 349133.

It is a weak prime.

It is an emirp because it is prime and its reverse (349133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331943 - 2¹⁴ = 315559 is a prime.

It is a super-2 number, since 2×331943² = 220372310498, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331943.

It is not a weakly prime, because it can be changed into another prime (331973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165971 + 165972.

It is an arithmetic number, because the mean of its divisors is an integer number (165972).

2³³¹⁹⁴³ is an apocalyptic number.

331943 is a deficient number, since it is larger than the sum of its proper divisors (1).

331943 is an equidigital number, since it uses as much as digits as its factorization.

331943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

The square root of 331943 is about 576.1449470402. The cubic root of 331943 is about 69.2395927659.

The spelling of 331943 in words is "three hundred thirty-one thousand, nine hundred forty-three".