131144305 has 4 divisors (see below), whose sum is σ = 157373172. Its totient is φ = 104915440.

The previous prime is 131144303. The next prime is 131144309. The reversal of 131144305 is 503441131.

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 25280784 + 105863521 = 5028^2 + 10289^2 .

It is not a de Polignac number, because 131144305 - 2¹ = 131144303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131144303) 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, 13114426 + ... + 13114435.

It is an arithmetic number, because the mean of its divisors is an integer number (39343293).

Almost surely, 2^131144305 is an apocalyptic number.

It is an amenable number.

131144305 is a deficient number, since it is larger than the sum of its proper divisors (26228867).

131144305 is an equidigital number, since it uses as much as digits as its factorization.

131144305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26228866.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131144305 is about 11451.8254003456. The cubic root of 131144305 is about 508.0617252481.

Adding to 131144305 its reverse (503441131), we get a palindrome (634585436).

The spelling of 131144305 in words is "one hundred thirty-one million, one hundred forty-four thousand, three hundred five".