11520231 has 4 divisors (see below), whose sum is σ = 15360312. Its totient is φ = 7680152.

The previous prime is 11520227. The next prime is 11520269. The reversal of 11520231 is 13202511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11520231 - 2² = 11520227 is a prime.

It is a super-2 number, since 2×11520231² = 265431444586722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11520231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1920036 + ... + 1920041.

It is an arithmetic number, because the mean of its divisors is an integer number (3840078).

Almost surely, 2^11520231 is an apocalyptic number.

11520231 is a deficient number, since it is larger than the sum of its proper divisors (3840081).

11520231 is an equidigital number, since it uses as much as digits as its factorization.

11520231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840080.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11520231 is about 3394.1465790387. The cubic root of 11520231 is about 225.8501565000.

Adding to 11520231 its reverse (13202511), we get a palindrome (24722742).

The spelling of 11520231 in words is "eleven million, five hundred twenty thousand, two hundred thirty-one".