131309206 has 8 divisors (see below), whose sum is σ = 225101520. Its totient is φ = 56275368.

The previous prime is 131309203. The next prime is 131309221. The reversal of 131309206 is 602903131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131309203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4689601 + ... + 4689628.

It is an arithmetic number, because the mean of its divisors is an integer number (28137690).

Almost surely, 2^131309206 is an apocalyptic number.

131309206 is a deficient number, since it is larger than the sum of its proper divisors (93792314).

131309206 is an equidigital number, since it uses as much as digits as its factorization.

131309206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9379238.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 131309206 is about 11459.0229077352. The cubic root of 131309206 is about 508.2745818570.

The spelling of 131309206 in words is "one hundred thirty-one million, three hundred nine thousand, two hundred six".