331117 has 4 divisors (see below), whose sum is σ = 332640. Its totient is φ = 329596.

The previous prime is 331099. The next prime is 331127. The reversal of 331117 is 711133.

It is a happy number.

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 331117 - 2¹⁵ = 298349 is a prime.

It is a Duffinian number.

331117 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 331117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2³³¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

331117 is a deficient number, since it is larger than the sum of its proper divisors (1523).

331117 is a wasteful number, since it uses less digits than its factorization.

331117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522.

The product of its digits is 63, while the sum is 16.

The square root of 331117 is about 575.4276670443. The cubic root of 331117 is about 69.1821136126.

Adding to 331117 its sum of digits (16), we get a palindrome (331133).

The spelling of 331117 in words is "three hundred thirty-one thousand, one hundred seventeen".