11531385 has 24 divisors (see below), whose sum is σ = 21041280. Its totient is φ = 5825952.

The previous prime is 11531371. The next prime is 11531407. The reversal of 11531385 is 58313511.

It is not a de Polignac number, because 11531385 - 2⁹ = 11530873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5889 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (876720).

Almost surely, 2^11531385 is an apocalyptic number.

11531385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11531385 is a deficient number, since it is larger than the sum of its proper divisors (9509895).

11531385 is a wasteful number, since it uses less digits than its factorization.

11531385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13517 (or 13514 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11531385 is about 3395.7893044180. The cubic root of 11531385 is about 225.9230230963.

Adding to 11531385 its reverse (58313511), we get a palindrome (69844896).

The spelling of 11531385 in words is "eleven million, five hundred thirty-one thousand, three hundred eighty-five".