331665413 has 4 divisors (see below), whose sum is σ = 331852800. Its totient is φ = 331478028.

The previous prime is 331665409. The next prime is 331665419. The reversal of 331665413 is 314566133.

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 a cyclic number.

It is not a de Polignac number, because 331665413 - 2² = 331665409 is a prime.

It is a super-2 number, since 2×331665413² = 220003892360921138, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331665413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331665419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91013 + ... + 94586.

It is an arithmetic number, because the mean of its divisors is an integer number (82963200).

Almost surely, 2^331665413 is an apocalyptic number.

It is an amenable number.

331665413 is a deficient number, since it is larger than the sum of its proper divisors (187387).

331665413 is a wasteful number, since it uses less digits than its factorization.

331665413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187386.

The product of its digits is 19440, while the sum is 32.

The square root of 331665413 is about 18211.6834202662. The cubic root of 331665413 is about 692.2028687006.

The spelling of 331665413 in words is "three hundred thirty-one million, six hundred sixty-five thousand, four hundred thirteen".