131210536 has 8 divisors (see below), whose sum is σ = 246019770. Its totient is φ = 65605264.

The previous prime is 131210533. The next prime is 131210543. The reversal of 131210536 is 635012131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 125305636 + 5904900 = 11194^2 + 2430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (131210533) 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 as a sum of consecutive naturals, namely, 8200651 + ... + 8200666.

Almost surely, 2^131210536 is an apocalyptic number.

It is an amenable number.

131210536 is a deficient number, since it is larger than the sum of its proper divisors (114809234).

131210536 is a wasteful number, since it uses less digits than its factorization.

131210536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401323 (or 16401319 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131210536 is about 11454.7167577378. The cubic root of 131210536 is about 508.1472386148.

Adding to 131210536 its reverse (635012131), we get a palindrome (766222667).

The spelling of 131210536 in words is "one hundred thirty-one million, two hundred ten thousand, five hundred thirty-six".