331221150 has 192 divisors, whose sum is σ = 999311040. Its totient is φ = 81181440.

The previous prime is 331221139. The next prime is 331221169. The reversal of 331221150 is 51122133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1421434 + ... + 1421666.

It is an arithmetic number, because the mean of its divisors is an integer number (5204745).

Almost surely, 2^331221150 is an apocalyptic number.

331221150 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 331221150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499655520).

331221150 is an abundant number, since it is smaller than the sum of its proper divisors (668089890).

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

331221150 is a wasteful number, since it uses less digits than its factorization.

331221150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 331221150 is about 18199.4821354895. The cubic root of 331221150 is about 691.8936639819.

Adding to 331221150 its reverse (51122133), we get a palindrome (382343283).

The spelling of 331221150 in words is "three hundred thirty-one million, two hundred twenty-one thousand, one hundred fifty".