331320133 has 4 divisors (see below), whose sum is σ = 331359840. Its totient is φ = 331280428.

The previous prime is 331320131. The next prime is 331320137. The reversal of 331320133 is 331023133.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 331320133 - 2¹ = 331320131 is a prime.

It is a super-2 number, since 2×331320133² = 219546061062275378, 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 331320133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331320131) 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, 1963 + ... + 25816.

It is an arithmetic number, because the mean of its divisors is an integer number (82839960).

Almost surely, 2^331320133 is an apocalyptic number.

It is an amenable number.

331320133 is a deficient number, since it is larger than the sum of its proper divisors (39707).

331320133 is a wasteful number, since it uses less digits than its factorization.

331320133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39706.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 331320133 is about 18202.2013229170. The cubic root of 331320133 is about 691.9625795585.

Adding to 331320133 its reverse (331023133), we get a palindrome (662343266).

The spelling of 331320133 in words is "three hundred thirty-one million, three hundred twenty thousand, one hundred thirty-three".