1312013232 has 120 divisors (see below), whose sum is σ = 3918610800. Its totient is φ = 408582144.

The previous prime is 1312013221. The next prime is 1312013249. The reversal of 1312013232 is 2323102131.

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

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 196444 + ... + 203012.

It is an arithmetic number, because the mean of its divisors is an integer number (32655090).

Almost surely, 2^1312013232 is an apocalyptic number.

1312013232 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 1312013232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959305400).

1312013232 is an abundant number, since it is smaller than the sum of its proper divisors (2606597568).

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

1312013232 is a wasteful number, since it uses less digits than its factorization.

1312013232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675 (or 6666 counting only the distinct ones).

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

The square root of 1312013232 is about 36221.7232058333. The cubic root of 1312013232 is about 1094.7444152343.

Adding to 1312013232 its reverse (2323102131), we get a palindrome (3635115363).

The spelling of 1312013232 in words is "one billion, three hundred twelve million, thirteen thousand, two hundred thirty-two".