331221234 has 16 divisors (see below), whose sum is σ = 701409888. Its totient is φ = 103912512.

The previous prime is 331221203. The next prime is 331221239. The reversal of 331221234 is 432122133.

It is a self number, because there is not a number n which added to its sum of digits gives 331221234.

It is not an unprimeable number, because it can be changed into a prime (331221239) 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, 1623532 + ... + 1623735.

It is an arithmetic number, because the mean of its divisors is an integer number (43838118).

Almost surely, 2^331221234 is an apocalyptic number.

331221234 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

331221234 is an abundant number, since it is smaller than the sum of its proper divisors (370188654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331221234 is a wasteful number, since it uses less digits than its factorization.

331221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247289.

The product of its digits is 864, while the sum is 21.

The square root of 331221234 is about 18199.4844432473. The cubic root of 331221234 is about 691.8937224716.

Adding to 331221234 its reverse (432122133), we get a palindrome (763343367).

The spelling of 331221234 in words is "three hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty-four".