11180831 has 2 divisors, whose sum is σ = 11180832. Its totient is φ = 11180830.

The previous prime is 11180821. The next prime is 11180837. The reversal of 11180831 is 13808111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11180831 is a prime.

It is a super-2 number, since 2×11180831² = 250021963701122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11180797 and 11180806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11180837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590415 + 5590416.

It is an arithmetic number, because the mean of its divisors is an integer number (5590416).

Almost surely, 2^11180831 is an apocalyptic number.

11180831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11180831 is an equidigital number, since it uses as much as digits as its factorization.

11180831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11180831 is about 3343.7749625236. The cubic root of 11180831 is about 223.6100717854.

Adding to 11180831 its reverse (13808111), we get a palindrome (24988942).

The spelling of 11180831 in words is "eleven million, one hundred eighty thousand, eight hundred thirty-one".