331312213000 has 64 divisors (see below), whose sum is σ = 776041297200. Its totient is φ = 132393139200.

The previous prime is 331312212949. The next prime is 331312213009. The reversal of 331312213000 is 312213133.

It can be written as a sum of positive squares in 8 ways, for example, as 20557250884 + 310754962116 = 143378^2 + 557454^2 .

It is not an unprimeable number, because it can be changed into a prime (331312213009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844822 + ... + 1173178.

Almost surely, 2^331312213000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331312213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388020648600).

331312213000 is an abundant number, since it is smaller than the sum of its proper divisors (444729084200).

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

331312213000 is a wasteful number, since it uses less digits than its factorization.

331312213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329387 (or 329373 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 331312213000 its reverse (312213133), we get a palindrome (331624426133).

The spelling of 331312213000 in words is "three hundred thirty-one billion, three hundred twelve million, two hundred thirteen thousand".