331005612 has 96 divisors (see below), whose sum is σ = 935764480. Its totient is φ = 88957440.

The previous prime is 331005611. The next prime is 331005671. The reversal of 331005612 is 216500133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (331005611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249912 + ... + 251232.

Almost surely, 2^331005612 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 331005612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467882240).

331005612 is an abundant number, since it is smaller than the sum of its proper divisors (604758868).

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

331005612 is a wasteful number, since it uses less digits than its factorization.

331005612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 331005612 is about 18193.5596297151. The cubic root of 331005612 is about 691.7435510476.

Adding to 331005612 its reverse (216500133), we get a palindrome (547505745).

The spelling of 331005612 in words is "three hundred thirty-one million, five thousand, six hundred twelve".