331421312 has 16 divisors (see below), whose sum is σ = 660253650. Its totient is φ = 165710592.

The previous prime is 331421303. The next prime is 331421371. The reversal of 331421312 is 213124133.

It can be written as a sum of positive squares in only one way, i.e., 308915776 + 22505536 = 17576^2 + 4744^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1294487 + ... + 1294742.

Almost surely, 2^331421312 is an apocalyptic number.

331421312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

331421312 is a deficient number, since it is larger than the sum of its proper divisors (328832338).

331421312 is an equidigital number, since it uses as much as digits as its factorization.

331421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589243 (or 2589231 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 331421312 is about 18204.9804174572. The cubic root of 331421312 is about 692.0330098858.

Adding to 331421312 its reverse (213124133), we get a palindrome (544545445).

The spelling of 331421312 in words is "three hundred thirty-one million, four hundred twenty-one thousand, three hundred twelve".