331998011 has 2 divisors, whose sum is σ = 331998012. Its totient is φ = 331998010.

The previous prime is 331997971. The next prime is 331998013. The reversal of 331998011 is 110899133.

It is a strong prime.

It is an emirp because it is prime and its reverse (110899133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331998011 - 2²⁶ = 264889147 is a prime.

It is a super-2 number, since 2×331998011² = 220445358615912242, which contains 22 as substring.

Together with 331998013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331998013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165999005 + 165999006.

It is an arithmetic number, because the mean of its divisors is an integer number (165999006).

Almost surely, 2^331998011 is an apocalyptic number.

331998011 is a deficient number, since it is larger than the sum of its proper divisors (1).

331998011 is an equidigital number, since it uses as much as digits as its factorization.

331998011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 331998011 is about 18220.8125779286. The cubic root of 331998011 is about 692.4341744745.

The spelling of 331998011 in words is "three hundred thirty-one million, nine hundred ninety-eight thousand, eleven".