1311320200 has 24 divisors (see below), whose sum is σ = 3048819930. Its totient is φ = 524528000.

The previous prime is 1311320191. The next prime is 1311320267. The reversal of 1311320200 is 20231131.

It can be written as a sum of positive squares in 3 ways, for example, as 923308996 + 388011204 = 30386^2 + 19698^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3278101 + ... + 3278500.

Almost surely, 2^1311320200 is an apocalyptic number.

1311320200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311320200 is an abundant number, since it is smaller than the sum of its proper divisors (1737499730).

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

1311320200 is a wasteful number, since it uses less digits than its factorization.

1311320200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556617 (or 6556608 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1311320200 is about 36212.1554177599. The cubic root of 1311320200 is about 1094.5516258838.

Adding to 1311320200 its reverse (20231131), we get a palindrome (1331551331).

The spelling of 1311320200 in words is "one billion, three hundred eleven million, three hundred twenty thousand, two hundred".