331233220 has 12 divisors (see below), whose sum is σ = 695589804. Its totient is φ = 132493280.

The previous prime is 331233211. The next prime is 331233229. The reversal of 331233220 is 22332133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331233211) and next prime (331233229).

It can be written as a sum of positive squares in 2 ways, for example, as 260370496 + 70862724 = 16136^2 + 8418^2 .

It is not an unprimeable number, because it can be changed into a prime (331233229) 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, 8280811 + ... + 8280850.

It is an arithmetic number, because the mean of its divisors is an integer number (57965817).

Almost surely, 2^331233220 is an apocalyptic number.

It is an amenable number.

331233220 is an abundant number, since it is smaller than the sum of its proper divisors (364356584).

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

331233220 is a wasteful number, since it uses less digits than its factorization.

331233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561670 (or 16561668 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 331233220 is about 18199.8137353106. The cubic root of 331233220 is about 691.9020682914.

Adding to 331233220 its reverse (22332133), we get a palindrome (353565353).

The spelling of 331233220 in words is "three hundred thirty-one million, two hundred thirty-three thousand, two hundred twenty".