1231230312 has 192 divisors, whose sum is σ = 3698472960. Its totient is φ = 367718400.

The previous prime is 1231230263. The next prime is 1231230323. The reversal of 1231230312 is 2130321321.

1231230312 is a `hidden beast` number, since 12 + 312 + 30 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6446137 + ... + 6446327.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^1231230312 is an apocalyptic number.

1231230312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231230312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849236480).

1231230312 is an abundant number, since it is smaller than the sum of its proper divisors (2467242648).

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

1231230312 is a wasteful number, since it uses less digits than its factorization.

1231230312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1231230312 is about 35088.8915755400. The cubic root of 1231230312 is about 1071.7983883308.

Adding to 1231230312 its reverse (2130321321), we get a palindrome (3361551633).

It can be divided in two parts, 12312 and 30312, that added together give a palindrome (42624).

The spelling of 1231230312 in words is "one billion, two hundred thirty-one million, two hundred thirty thousand, three hundred twelve".