11715231 has 8 divisors (see below), whose sum is σ = 17040384. Its totient is φ = 7100120.

The previous prime is 11715203. The next prime is 11715239. The reversal of 11715231 is 13251711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11715231 - 2⁹ = 11714719 is a prime.

It is a super-2 number, since 2×11715231² = 274493274766722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11715198 and 11715207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11715239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177471 + ... + 177536.

It is an arithmetic number, because the mean of its divisors is an integer number (2130048).

Almost surely, 2^11715231 is an apocalyptic number.

11715231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11715231 is a deficient number, since it is larger than the sum of its proper divisors (5325153).

11715231 is a wasteful number, since it uses less digits than its factorization.

11715231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355021.

The product of its digits is 210, while the sum is 21.

The square root of 11715231 is about 3422.7519629678. The cubic root of 11715231 is about 227.1173360150.

Adding to 11715231 its reverse (13251711), we get a palindrome (24966942).

The spelling of 11715231 in words is "eleven million, seven hundred fifteen thousand, two hundred thirty-one".