1311500105 has 32 divisors (see below), whose sum is σ = 1752772608. Its totient is φ = 937497600.

The previous prime is 1311500077. The next prime is 1311500107. The reversal of 1311500105 is 5010051131.

It is not a de Polignac number, because 1311500105 - 2³⁰ = 237758281 is a prime.

It is a super-2 number, since 2×1311500105² = 3440065050830022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311500107) 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 31 ways as a sum of consecutive naturals, for example, 134960 + ... + 144350.

It is an arithmetic number, because the mean of its divisors is an integer number (54774144).

Almost surely, 2^1311500105 is an apocalyptic number.

It is an amenable number.

1311500105 is a deficient number, since it is larger than the sum of its proper divisors (441272503).

1311500105 is a wasteful number, since it uses less digits than its factorization.

1311500105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497.

The product of its (nonzero) digits is 75, while the sum is 17.

The square root of 1311500105 is about 36214.6393741537. The cubic root of 1311500105 is about 1094.6016788268.

Adding to 1311500105 its reverse (5010051131), we get a palindrome (6321551236).

The spelling of 1311500105 in words is "one billion, three hundred eleven million, five hundred thousand, one hundred five".