331133221 has 8 divisors (see below), whose sum is σ = 334666080. Its totient is φ = 327608688.

The previous prime is 331133203. The next prime is 331133237. The reversal of 331133221 is 122331133.

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

It is a cyclic number.

It is not a de Polignac number, because 331133221 - 2¹¹ = 331131173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331133251) 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, 107515 + ... + 110551.

It is an arithmetic number, because the mean of its divisors is an integer number (41833260).

Almost surely, 2^331133221 is an apocalyptic number.

It is an amenable number.

331133221 is a deficient number, since it is larger than the sum of its proper divisors (3532859).

331133221 is a wasteful number, since it uses less digits than its factorization.

331133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163.

The product of its digits is 324, while the sum is 19.

The square root of 331133221 is about 18197.0662745400. The cubic root of 331133221 is about 691.8324330870.

Adding to 331133221 its reverse (122331133), we get a palindrome (453464354).

The spelling of 331133221 in words is "three hundred thirty-one million, one hundred thirty-three thousand, two hundred twenty-one".