131342805 has 24 divisors (see below), whose sum is σ = 248358240. Its totient is φ = 63681120.

The previous prime is 131342797. The next prime is 131342837. The reversal of 131342805 is 508243131.

It is a happy number.

It is not a de Polignac number, because 131342805 - 2³ = 131342797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132175 + ... + 133164.

It is an arithmetic number, because the mean of its divisors is an integer number (10348260).

Almost surely, 2^131342805 is an apocalyptic number.

131342805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131342805 is a deficient number, since it is larger than the sum of its proper divisors (117015435).

131342805 is a wasteful number, since it uses less digits than its factorization.

131342805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265361 (or 265358 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 131342805 is about 11460.4888639185. The cubic root of 131342805 is about 508.3179300776.

Adding to 131342805 its reverse (508243131), we get a palindrome (639585936).

The spelling of 131342805 in words is "one hundred thirty-one million, three hundred forty-two thousand, eight hundred five".