331117985 has 8 divisors (see below), whose sum is σ = 433463616. Its totient is φ = 240813040.

The previous prime is 331117981. The next prime is 331118033. The reversal of 331117985 is 589711133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331117985 - 2² = 331117981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331117981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010109 + ... + 3010218.

It is an arithmetic number, because the mean of its divisors is an integer number (54182952).

Almost surely, 2^331117985 is an apocalyptic number.

It is an amenable number.

331117985 is a deficient number, since it is larger than the sum of its proper divisors (102345631).

331117985 is a wasteful number, since it uses less digits than its factorization.

331117985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020343.

The product of its digits is 22680, while the sum is 38.

The square root of 331117985 is about 18196.6476308138. The cubic root of 331117985 is about 691.8218221305.

The spelling of 331117985 in words is "three hundred thirty-one million, one hundred seventeen thousand, nine hundred eighty-five".