1231032312 has 48 divisors (see below), whose sum is σ = 3479009040. Its totient is φ = 392502528.

The previous prime is 1231032311. The next prime is 1231032343. The reversal of 1231032312 is 2132301321.

1231032312 is a `hidden beast` number, since 12 + 310 + 32 + 312 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231032311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370033 + ... + 373344.

It is an arithmetic number, because the mean of its divisors is an integer number (72479355).

Almost surely, 2^1231032312 is an apocalyptic number.

1231032312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231032312 is an abundant number, since it is smaller than the sum of its proper divisors (2247976728).

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

1231032312 is a wasteful number, since it uses less digits than its factorization.

1231032312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743412 (or 743405 counting only the distinct ones).

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

The square root of 1231032312 is about 35086.0700563628. The cubic root of 1231032312 is about 1071.7409315859.

Adding to 1231032312 its reverse (2132301321), we get a palindrome (3363333633).

The spelling of 1231032312 in words is "one billion, two hundred thirty-one million, thirty-two thousand, three hundred twelve".