131601366 has 24 divisors (see below), whose sum is σ = 307070400. Its totient is φ = 40492656.

The previous prime is 131601359. The next prime is 131601367. The reversal of 131601366 is 663106131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131601367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280966 + ... + 281433.

It is an arithmetic number, because the mean of its divisors is an integer number (12794600).

Almost surely, 2^131601366 is an apocalyptic number.

131601366 is an abundant number, since it is smaller than the sum of its proper divisors (175469034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131601366 is a wasteful number, since it uses less digits than its factorization.

131601366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562420 (or 562417 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 131601366 is about 11471.7638574022. The cubic root of 131601366 is about 508.6512690870.

Adding to 131601366 its reverse (663106131), we get a palindrome (794707497).

The spelling of 131601366 in words is "one hundred thirty-one million, six hundred one thousand, three hundred sixty-six".