11718131 has 2 divisors, whose sum is σ = 11718132. Its totient is φ = 11718130.

The previous prime is 11718127. The next prime is 11718137. The reversal of 11718131 is 13181711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11718131 - 2² = 11718127 is a prime.

It is a super-2 number, since 2×11718131² = 274629188266322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11718097 and 11718106.

It is not a weakly prime, because it can be changed into another prime (11718137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859065 + 5859066.

It is an arithmetic number, because the mean of its divisors is an integer number (5859066).

Almost surely, 2^11718131 is an apocalyptic number.

11718131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718131 is an equidigital number, since it uses as much as digits as its factorization.

11718131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 23.

The square root of 11718131 is about 3423.1755724765. The cubic root of 11718131 is about 227.1360747531.

Adding to 11718131 its reverse (13181711), we get a palindrome (24899842).

The spelling of 11718131 in words is "eleven million, seven hundred eighteen thousand, one hundred thirty-one".