1312132200 has 96 divisors (see below), whose sum is σ = 4097133600. Its totient is φ = 347362560.

The previous prime is 1312132177. The next prime is 1312132207. The reversal of 1312132200 is 22312131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1312132200.

It is not an unprimeable number, because it can be changed into a prime (1312132207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75534 + ... + 91266.

It is an arithmetic number, because the mean of its divisors is an integer number (42678475).

Almost surely, 2^1312132200 is an apocalyptic number.

1312132200 is a gapful number since it is divisible by the number (10) 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 1312132200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048566800).

1312132200 is an abundant number, since it is smaller than the sum of its proper divisors (2785001400).

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

1312132200 is a wasteful number, since it uses less digits than its factorization.

1312132200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15891 (or 15882 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312132200 is about 36223.3653875506. The cubic root of 1312132200 is about 1094.7775032179. Note that the first 3 decimals are identical.

Adding to 1312132200 its reverse (22312131), we get a palindrome (1334444331).

The spelling of 1312132200 in words is "one billion, three hundred twelve million, one hundred thirty-two thousand, two hundred".