331693816 has 8 divisors (see below), whose sum is σ = 621925920. Its totient is φ = 165846904.

The previous prime is 331693801. The next prime is 331693819. The reversal of 331693816 is 618396133.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×331693816² = 220041575145283712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331693819) 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, 20730856 + ... + 20730871.

It is an arithmetic number, because the mean of its divisors is an integer number (77740740).

Almost surely, 2^331693816 is an apocalyptic number.

It is an amenable number.

331693816 is a deficient number, since it is larger than the sum of its proper divisors (290232104).

331693816 is a wasteful number, since it uses less digits than its factorization.

331693816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41461733 (or 41461729 counting only the distinct ones).

The product of its digits is 69984, while the sum is 40.

The square root of 331693816 is about 18212.4632051790. The cubic root of 331693816 is about 692.2226276466. Note that the first 3 decimals are identical.

The spelling of 331693816 in words is "three hundred thirty-one million, six hundred ninety-three thousand, eight hundred sixteen".