331201312 has 48 divisors (see below), whose sum is σ = 739186560. Its totient is φ = 144813312.

The previous prime is 331201271. The next prime is 331201313. The reversal of 331201312 is 213102133.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (331201313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13048 + ... + 28855.

It is an arithmetic number, because the mean of its divisors is an integer number (15399720).

Almost surely, 2^331201312 is an apocalyptic number.

331201312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

331201312 is an abundant number, since it is smaller than the sum of its proper divisors (407985248).

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

331201312 is a wasteful number, since it uses less digits than its factorization.

331201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41945 (or 41937 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 331201312 is about 18198.9371118206. The cubic root of 331201312 is about 691.8798503909.

Adding to 331201312 its reverse (213102133), we get a palindrome (544303445).

The spelling of 331201312 in words is "three hundred thirty-one million, two hundred one thousand, three hundred twelve".