131906566 has 16 divisors (see below), whose sum is σ = 216221328. Its totient is φ = 59853600.

The previous prime is 131906561. The next prime is 131906617. The reversal of 131906566 is 665609131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131906561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8596 + ... + 18376.

It is an arithmetic number, because the mean of its divisors is an integer number (13513833).

Almost surely, 2^131906566 is an apocalyptic number.

131906566 is a deficient number, since it is larger than the sum of its proper divisors (84314762).

131906566 is a wasteful number, since it uses less digits than its factorization.

131906566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 131906566 is about 11485.0583803479. The cubic root of 131906566 is about 509.0441741131.

It can be divided in two parts, 1319065 and 66, that added together give a palindrome (1319131).

The spelling of 131906566 in words is "one hundred thirty-one million, nine hundred six thousand, five hundred sixty-six".