131864643313 has 4 divisors (see below), whose sum is σ = 142008077428. Its totient is φ = 121721209200.

The previous prime is 131864643307. The next prime is 131864643341. The reversal of 131864643313 is 313346468131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13245017569 + 118619625744 = 115087^2 + 344412^2 .

It is a cyclic number.

It is not a de Polignac number, because 131864643313 - 2¹³ = 131864635121 is a prime.

It is a super-3 number, since 3×131864643313³ (a number of 34 digits) contains 333 as substring.

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 131864643313.

It is not an unprimeable number, because it can be changed into a prime (131864643013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5071717038 + ... + 5071717063.

It is an arithmetic number, because the mean of its divisors is an integer number (35502019357).

Almost surely, 2^131864643313 is an apocalyptic number.

131864643313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131864643313 is a deficient number, since it is larger than the sum of its proper divisors (10143434115).

131864643313 is a wasteful number, since it uses less digits than its factorization.

131864643313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143434114.

The product of its digits is 373248, while the sum is 43.

The spelling of 131864643313 in words is "one hundred thirty-one billion, eight hundred sixty-four million, six hundred forty-three thousand, three hundred thirteen".