331231001 has 4 divisors (see below), whose sum is σ = 341915904. Its totient is φ = 320546100.

The previous prime is 331230997. The next prime is 331231007. The reversal of 331231001 is 100132133.

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 331231001 - 2² = 331230997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331231007) 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 in 3 ways as a sum of consecutive naturals, for example, 5342405 + ... + 5342466.

It is an arithmetic number, because the mean of its divisors is an integer number (85478976).

Almost surely, 2^331231001 is an apocalyptic number.

331231001 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

331231001 is a deficient number, since it is larger than the sum of its proper divisors (10684903).

331231001 is a wasteful number, since it uses less digits than its factorization.

331231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684902.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 331231001 is about 18199.7527730461. The cubic root of 331231001 is about 691.9005232228.

Adding to 331231001 its reverse (100132133), we get a palindrome (431363134).

The spelling of 331231001 in words is "three hundred thirty-one million, two hundred thirty-one thousand, one".