1312331232 has 24 divisors (see below), whose sum is σ = 3444869736. Its totient is φ = 437443712.

The previous prime is 1312331231. The next prime is 1312331243. The reversal of 1312331232 is 2321332131.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1312331199 and 1312331208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312331231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6834963 + ... + 6835154.

It is an arithmetic number, because the mean of its divisors is an integer number (143536239).

Almost surely, 2^1312331232 is an apocalyptic number.

1312331232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312331232 is an abundant number, since it is smaller than the sum of its proper divisors (2132538504).

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

1312331232 is a wasteful number, since it uses less digits than its factorization.

1312331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13670130 (or 13670122 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1312331232 is about 36226.1125709066. The cubic root of 1312331232 is about 1094.8328545359.

Adding to 1312331232 its reverse (2321332131), we get a palindrome (3633663363).

The spelling of 1312331232 in words is "one billion, three hundred twelve million, three hundred thirty-one thousand, two hundred thirty-two".