131444530205 has 4 divisors (see below), whose sum is σ = 157733436252. Its totient is φ = 105155624160.

The previous prime is 131444530201. The next prime is 131444530207. The reversal of 131444530205 is 502035444131.

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 43113123769 + 88331406436 = 207637^2 + 297206^2 .

It is not a de Polignac number, because 131444530205 - 2² = 131444530201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444530201) 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, 13144453016 + ... + 13144453025.

It is an arithmetic number, because the mean of its divisors is an integer number (39433359063).

Almost surely, 2^131444530205 is an apocalyptic number.

It is an amenable number.

131444530205 is a deficient number, since it is larger than the sum of its proper divisors (26288906047).

131444530205 is an equidigital number, since it uses as much as digits as its factorization.

131444530205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26288906046.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 131444530205 its reverse (502035444131), we get a palindrome (633479974336).

The spelling of 131444530205 in words is "one hundred thirty-one billion, four hundred forty-four million, five hundred thirty thousand, two hundred five".