11315231 has 2 divisors, whose sum is σ = 11315232. Its totient is φ = 11315230.

The previous prime is 11315207. The next prime is 11315237. The reversal of 11315231 is 13251311.

11315231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13251311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11315231 - 2⁶ = 11315167 is a prime.

It is a super-2 number, since 2×11315231² = 256068905166722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11315237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5657615 + 5657616.

It is an arithmetic number, because the mean of its divisors is an integer number (5657616).

Almost surely, 2^11315231 is an apocalyptic number.

11315231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11315231 is an equidigital number, since it uses as much as digits as its factorization.

11315231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 17.

The square root of 11315231 is about 3363.8119745313. The cubic root of 11315231 is about 224.5024792923.

Adding to 11315231 its reverse (13251311), we get a palindrome (24566542).

The spelling of 11315231 in words is "eleven million, three hundred fifteen thousand, two hundred thirty-one".