331665133 has 2 divisors, whose sum is σ = 331665134. Its totient is φ = 331665132.

The previous prime is 331665109. The next prime is 331665161. The reversal of 331665133 is 331566133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330439684 + 1225449 = 18178^2 + 1107^2 .

It is a cyclic number.

It is not a de Polignac number, because 331665133 - 2²¹ = 329567981 is a prime.

It is a super-2 number, since 2×331665133² = 220003520895815378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331665095 and 331665104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331665193) 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, 165832566 + 165832567.

It is an arithmetic number, because the mean of its divisors is an integer number (165832567).

Almost surely, 2^331665133 is an apocalyptic number.

It is an amenable number.

331665133 is a deficient number, since it is larger than the sum of its proper divisors (1).

331665133 is an equidigital number, since it uses as much as digits as its factorization.

331665133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 31.

The square root of 331665133 is about 18211.6757328918. The cubic root of 331665133 is about 692.2026739091.

The spelling of 331665133 in words is "three hundred thirty-one million, six hundred sixty-five thousand, one hundred thirty-three".