331212330 has 96 divisors (see below), whose sum is σ = 882161280. Its totient is φ = 86198400.

The previous prime is 331212293. The next prime is 331212341. The reversal of 331212330 is 33212133.

331212330 = 498² + 499² + ... + 1037².

331212330 is a `hidden beast` number, since 331 + 2 + 1 + 2 + 330 = 666.

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

It is an unprimeable number.

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, 754251 + ... + 754689.

It is an arithmetic number, because the mean of its divisors is an integer number (9189180).

Almost surely, 2^331212330 is an apocalyptic number.

331212330 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 331212330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441080640).

331212330 is an abundant number, since it is smaller than the sum of its proper divisors (550948950).

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

331212330 is a wasteful number, since it uses less digits than its factorization.

331212330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 331212330 is about 18199.2398192892. The cubic root of 331212330 is about 691.8875225099.

Adding to 331212330 its reverse (33212133), we get a palindrome (364424463).

The spelling of 331212330 in words is "three hundred thirty-one million, two hundred twelve thousand, three hundred thirty".