131312005 has 32 divisors (see below), whose sum is σ = 177199488. Its totient is φ = 92601600.

The previous prime is 131311987. The next prime is 131312011. The reversal of 131312005 is 500213131.

It is not a de Polignac number, because 131312005 - 2¹¹ = 131309957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131312005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311695 + ... + 312115.

It is an arithmetic number, because the mean of its divisors is an integer number (5537484).

Almost surely, 2^131312005 is an apocalyptic number.

It is an amenable number.

131312005 is a deficient number, since it is larger than the sum of its proper divisors (45887483).

131312005 is a wasteful number, since it uses less digits than its factorization.

131312005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 131312005 is about 11459.1450379162. The cubic root of 131312005 is about 508.2781933084.

Adding to 131312005 its reverse (500213131), we get a palindrome (631525136).

The spelling of 131312005 in words is "one hundred thirty-one million, three hundred twelve thousand, five".