131117236 has 12 divisors (see below), whose sum is σ = 237367620. Its totient is φ = 63297920.

The previous prime is 131117183. The next prime is 131117237. The reversal of 131117236 is 632711131.

It can be written as a sum of positive squares in 2 ways, for example, as 73205136 + 57912100 = 8556^2 + 7610^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131117236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131117237) 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, 565045 + ... + 565276.

It is an arithmetic number, because the mean of its divisors is an integer number (19780635).

Almost surely, 2^131117236 is an apocalyptic number.

It is an amenable number.

131117236 is a deficient number, since it is larger than the sum of its proper divisors (106250384).

131117236 is a wasteful number, since it uses less digits than its factorization.

131117236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130354 (or 1130352 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 131117236 is about 11450.6434753685. The cubic root of 131117236 is about 508.0267671431.

Adding to 131117236 its reverse (632711131), we get a palindrome (763828367).

It can be divided in two parts, 13 and 1117236, that added together give a square (1117249 = 1057²).

The spelling of 131117236 in words is "one hundred thirty-one million, one hundred seventeen thousand, two hundred thirty-six".