1331230312 has 16 divisors (see below), whose sum is σ = 2556936900. Its totient is φ = 649380480.

The previous prime is 1331230301. The next prime is 1331230337. The reversal of 1331230312 is 2130321331.

It can be written as a sum of positive squares in 2 ways, for example, as 1331228196 + 2116 = 36486^2 + 46^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1331230312.

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 3 ways as a sum of consecutive naturals, for example, 2028987 + ... + 2029642.

Almost surely, 2^1331230312 is an apocalyptic number.

It is an amenable number.

1331230312 is a deficient number, since it is larger than the sum of its proper divisors (1225706588).

1331230312 is a wasteful number, since it uses less digits than its factorization.

1331230312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058676 (or 4058672 counting only the distinct ones).

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

The square root of 1331230312 is about 36486.0289974121. The cubic root of 1331230312 is about 1100.0634431728.

Adding to 1331230312 its reverse (2130321331), we get a palindrome (3461551643).

The spelling of 1331230312 in words is "one billion, three hundred thirty-one million, two hundred thirty thousand, three hundred twelve".