131305606 has 8 divisors (see below), whose sum is σ = 197631504. Its totient is φ = 65428440.

The previous prime is 131305589. The next prime is 131305607. The reversal of 131305606 is 606503131.

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 (131305607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111450 + ... + 112621.

It is an arithmetic number, because the mean of its divisors is an integer number (24703938).

Almost surely, 2^131305606 is an apocalyptic number.

131305606 is a deficient number, since it is larger than the sum of its proper divisors (66325898).

131305606 is a wasteful number, since it uses less digits than its factorization.

131305606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224366.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 131305606 is about 11458.8658252028. The cubic root of 131305606 is about 508.2699368280.

Adding to 131305606 its reverse (606503131), we get a palindrome (737808737).

The spelling of 131305606 in words is "one hundred thirty-one million, three hundred five thousand, six hundred six".