11131538 has 8 divisors (see below), whose sum is σ = 18215280. Its totient is φ = 5059780.

The previous prime is 11131507. The next prime is 11131543. The reversal of 11131538 is 83513111.

11131538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×11131538² = 247822276490888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252968 + ... + 253011.

It is an arithmetic number, because the mean of its divisors is an integer number (2276910).

Almost surely, 2^11131538 is an apocalyptic number.

11131538 is a deficient number, since it is larger than the sum of its proper divisors (7083742).

11131538 is a wasteful number, since it uses less digits than its factorization.

11131538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505992.

The product of its digits is 360, while the sum is 23.

The square root of 11131538 is about 3336.3959597146. The cubic root of 11131538 is about 223.2809773066.

Adding to 11131538 its reverse (83513111), we get a palindrome (94644649).

The spelling of 11131538 in words is "eleven million, one hundred thirty-one thousand, five hundred thirty-eight".