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BaseRepresentation
bin100111000110110…
…1001011001111001
310101110010200102121
41032031221121321
510141410402223
6334113001241
744342342614
oct11615513171
93343120377
101312200313
11613780576
12307553221
1317bb1a1b8
14c63b917b
157a30015d
hex4e369679

1312200313 has 4 divisors (see below), whose sum is σ = 1317832308. Its totient is φ = 1306568320.

The previous prime is 1312200289. The next prime is 1312200319. The reversal of 1312200313 is 3130022131.

Adding to 1312200313 its reverse (3130022131), we get a palindrome (4442222444).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3130022131 = 4289729779.

It can be written as a sum of positive squares in 2 ways, for example, as 880724329 + 431475984 = 29677^2 + 20772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312200313 - 213 = 1312192121 is a prime.

It is a super-2 number, since 2×13122003132 = 3443739322874595938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312200319) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2815648 + ... + 2816113.

It is an arithmetic number, because the mean of its divisors is an integer number (329458077).

Almost surely, 21312200313 is an apocalyptic number.

It is an amenable number.

1312200313 is a deficient number, since it is larger than the sum of its proper divisors (5631995).

1312200313 is an equidigital number, since it uses as much as digits as its factorization.

1312200313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5631994.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1312200313 is about 36224.3055558005. The cubic root of 1312200313 is about 1094.7964462507.

The spelling of 1312200313 in words is "one billion, three hundred twelve million, two hundred thousand, three hundred thirteen".

Divisors: 1 233 5631761 1312200313