331222650 has 96 divisors (see below), whose sum is σ = 901656576. Its totient is φ = 79800000.

The previous prime is 331222643. The next prime is 331222651. The reversal of 331222650 is 56222133.

It is a self number, because there is not a number n which added to its sum of digits gives 331222650.

It is not an unprimeable number, because it can be changed into a prime (331222651) 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 47 ways as a sum of consecutive naturals, for example, 314625 + ... + 315675.

It is an arithmetic number, because the mean of its divisors is an integer number (9392256).

Almost surely, 2^331222650 is an apocalyptic number.

331222650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 331222650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450828288).

331222650 is an abundant number, since it is smaller than the sum of its proper divisors (570433926).

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

331222650 is a wasteful number, since it uses less digits than its factorization.

331222650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 331222650 is about 18199.5233454066. The cubic root of 331222650 is about 691.8947084391.

Adding to 331222650 its reverse (56222133), we get a palindrome (387444783).

The spelling of 331222650 in words is "three hundred thirty-one million, two hundred twenty-two thousand, six hundred fifty".