11005231 has 2 divisors, whose sum is σ = 11005232. Its totient is φ = 11005230.

The previous prime is 11005223. The next prime is 11005259. The reversal of 11005231 is 13250011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11005231 - 2³ = 11005223 is a prime.

It is a super-2 number, since 2×11005231² = 242230218726722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11005531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5502615 + 5502616.

It is an arithmetic number, because the mean of its divisors is an integer number (5502616).

Almost surely, 2^11005231 is an apocalyptic number.

11005231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11005231 is an equidigital number, since it uses as much as digits as its factorization.

11005231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 11005231 is about 3317.4132995453. The cubic root of 11005231 is about 222.4332569243.

Adding to 11005231 its reverse (13250011), we get a palindrome (24255242).

It can be divided in two parts, 11005 and 231, that added together give a square (11236 = 106²).

The spelling of 11005231 in words is "eleven million, five thousand, two hundred thirty-one".