331022220 has 48 divisors (see below), whose sum is σ = 929547360. Its totient is φ = 88016896.

The previous prime is 331022203. The next prime is 331022221. The reversal of 331022220 is 22220133.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 331022220.

It is not an unprimeable number, because it can be changed into a prime (331022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13366 + ... + 28994.

It is an arithmetic number, because the mean of its divisors is an integer number (19365570).

Almost surely, 2^331022220 is an apocalyptic number.

331022220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331022220 is an abundant number, since it is smaller than the sum of its proper divisors (598525140).

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

331022220 is a wasteful number, since it uses less digits than its factorization.

331022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15994 (or 15992 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 331022220 is about 18194.0160492399. The cubic root of 331022220 is about 691.7551201211.

Adding to 331022220 its reverse (22220133), we get a palindrome (353242353).

The spelling of 331022220 in words is "three hundred thirty-one million, twenty-two thousand, two hundred twenty".