331808133 has 4 divisors (see below), whose sum is σ = 442410848. Its totient is φ = 221205420.

The previous prime is 331808123. The next prime is 331808149.

331808133 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 331808133 - 2⁴ = 331808117 is a prime.

It is a super-2 number, since 2×331808133² = 220193274249891378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331808133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331808123) 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 in 3 ways as a sum of consecutive naturals, for example, 55301353 + ... + 55301358.

It is an arithmetic number, because the mean of its divisors is an integer number (110602712).

Almost surely, 2^331808133 is an apocalyptic number.

It is an amenable number.

331808133 is a deficient number, since it is larger than the sum of its proper divisors (110602715).

331808133 is a wasteful number, since it uses less digits than its factorization.

331808133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110602714.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 331808133 is about 18215.6013625683. The cubic root of 331808133 is about 692.3021424693.

The spelling of 331808133 in words is "three hundred thirty-one million, eight hundred eight thousand, one hundred thirty-three".