11531137 has 4 divisors (see below), whose sum is σ = 11726640. Its totient is φ = 11335636.

The previous prime is 11531131. The next prime is 11531141. The reversal of 11531137 is 73113511.

11531137 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11531137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531131) 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, 97663 + ... + 97780.

It is an arithmetic number, because the mean of its divisors is an integer number (2931660).

Almost surely, 2^11531137 is an apocalyptic number.

It is an amenable number.

11531137 is a deficient number, since it is larger than the sum of its proper divisors (195503).

11531137 is an equidigital number, since it uses as much as digits as its factorization.

11531137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195502.

The product of its digits is 315, while the sum is 22.

The square root of 11531137 is about 3395.7527884108. The cubic root of 11531137 is about 225.9214034785.

Adding to 11531137 its reverse (73113511), we get a palindrome (84644648).

The spelling of 11531137 in words is "eleven million, five hundred thirty-one thousand, one hundred thirty-seven".