331143941 has 2 divisors, whose sum is σ = 331143942. Its totient is φ = 331143940.

The previous prime is 331143937. The next prime is 331143961. The reversal of 331143941 is 149341133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305235841 + 25908100 = 17471^2 + 5090^2 .

It is an emirp because it is prime and its reverse (149341133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331143941 - 2² = 331143937 is a prime.

It is a super-2 number, since 2×331143941² = 219312619322022962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331143961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165571970 + 165571971.

It is an arithmetic number, because the mean of its divisors is an integer number (165571971).

Almost surely, 2^331143941 is an apocalyptic number.

It is an amenable number.

331143941 is a deficient number, since it is larger than the sum of its proper divisors (1).

331143941 is an equidigital number, since it uses as much as digits as its factorization.

331143941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 331143941 is about 18197.3608251307. The cubic root of 331143941 is about 691.8398987264.

The spelling of 331143941 in words is "three hundred thirty-one million, one hundred forty-three thousand, nine hundred forty-one".