131636 has 6 divisors (see below), whose sum is σ = 230370. Its totient is φ = 65816.

The previous prime is 131627. The next prime is 131639. The reversal of 131636 is 636131.

It can be written as a sum of positive squares in only one way, i.e., 126736 + 4900 = 356^2 + 70^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16451 + ... + 16458.

It is an arithmetic number, because the mean of its divisors is an integer number (38395).

2¹³¹⁶³⁶ is an apocalyptic number.

It is an amenable number.

131636 is a deficient number, since it is larger than the sum of its proper divisors (98734).

131636 is a wasteful number, since it uses less digits than its factorization.

131636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32913 (or 32911 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 131636 is about 362.8167581576. The cubic root of 131636 is about 50.8695886362.

Adding to 131636 its reverse (636131), we get a palindrome (767767).

It can be divided in two parts, 131 and 636, that added together give a palindrome (767).

The spelling of 131636 in words is "one hundred thirty-one thousand, six hundred thirty-six".