1312031232 has 60 divisors (see below), whose sum is σ = 3786624270. Its totient is φ = 437342208.

The previous prime is 1312031213. The next prime is 1312031257. The reversal of 1312031232 is 2321302131.

It can be written as a sum of positive squares in only one way, i.e., 1285652736 + 26378496 = 35856^2 + 5136^2 .

It is a super-3 number, since 3×1312031232³ (a number of 28 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137757 + ... + 146972.

Almost surely, 2^1312031232 is an apocalyptic number.

1312031232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312031232 is an abundant number, since it is smaller than the sum of its proper divisors (2474593038).

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

1312031232 is an equidigital number, since it uses as much as digits as its factorization.

1312031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284753 (or 284734 counting only the distinct ones).

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

The square root of 1312031232 is about 36221.9716746618. The cubic root of 1312031232 is about 1094.7494216140.

Adding to 1312031232 its reverse (2321302131), we get a palindrome (3633333363).

The spelling of 1312031232 in words is "one billion, three hundred twelve million, thirty-one thousand, two hundred thirty-two".