131645266 has 8 divisors (see below), whose sum is σ = 198460800. Its totient is φ = 65491668.

The previous prime is 131645257. The next prime is 131645287. The reversal of 131645266 is 662546131.

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

It is an unprimeable number.

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, 164986 + ... + 165781.

It is an arithmetic number, because the mean of its divisors is an integer number (24807600).

Almost surely, 2^131645266 is an apocalyptic number.

131645266 is a deficient number, since it is larger than the sum of its proper divisors (66815534).

131645266 is a wasteful number, since it uses less digits than its factorization.

131645266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330968.

The product of its digits is 25920, while the sum is 34.

The square root of 131645266 is about 11473.6770914995. The cubic root of 131645266 is about 508.7078219656.

The spelling of 131645266 in words is "one hundred thirty-one million, six hundred forty-five thousand, two hundred sixty-six".