331001 has 4 divisors (see below), whose sum is σ = 361104. Its totient is φ = 300900.

The previous prime is 330997. The next prime is 331013. The reversal of 331001 is 100133.

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 an emirpimes, since its reverse is a distinct semiprime: 100133 = 11 ⋅9103.

It is a cyclic number.

It is not a de Polignac number, because 331001 - 2² = 330997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 331001.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331001.

It is not an unprimeable number, because it can be changed into a prime (331031) 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, 15035 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (90276).

2³³¹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

331001 is a deficient number, since it is larger than the sum of its proper divisors (30103).

331001 is a wasteful number, since it uses less digits than its factorization.

331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30102.

The product of its (nonzero) digits is 9, while the sum is 8.

The square root of 331001 is about 575.3268636175. The cubic root of 331001 is about 69.1740338276.

Adding to 331001 its reverse (100133), we get a palindrome (431134).

It can be divided in two parts, 33 and 1001, that multiplied together give a palindrome (33033).

The spelling of 331001 in words is "three hundred thirty-one thousand, one".