331005133 has 2 divisors, whose sum is σ = 331005134. Its totient is φ = 331005132.

The previous prime is 331005127. The next prime is 331005173. The reversal of 331005133 is 331500133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259145604 + 71859529 = 16098^2 + 8477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331005133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331005133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331005173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165502566 + 165502567.

It is an arithmetic number, because the mean of its divisors is an integer number (165502567).

Almost surely, 2^331005133 is an apocalyptic number.

It is an amenable number.

331005133 is a deficient number, since it is larger than the sum of its proper divisors (1).

331005133 is an equidigital number, since it uses as much as digits as its factorization.

331005133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 19.

The square root of 331005133 is about 18193.5464657114. The cubic root of 331005133 is about 691.7432173721.

Adding to 331005133 its reverse (331500133), we get a palindrome (662505266).

The spelling of 331005133 in words is "three hundred thirty-one million, five thousand, one hundred thirty-three".