11131539 has 8 divisors (see below), whose sum is σ = 15187392. Its totient is φ = 7248360.

The previous prime is 11131507. The next prime is 11131543. The reversal of 11131539 is 93513111.

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

It is not a de Polignac number, because 11131539 - 2⁵ = 11131507 is a prime.

It is a super-2 number, since 2×11131539² = 247822321017042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11131559) 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, 43017 + ... + 43274.

It is an arithmetic number, because the mean of its divisors is an integer number (1898424).

Almost surely, 2^11131539 is an apocalyptic number.

11131539 is a deficient number, since it is larger than the sum of its proper divisors (4055853).

11131539 is an equidigital number, since it uses as much as digits as its factorization.

11131539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86337.

The product of its digits is 405, while the sum is 24.

The square root of 11131539 is about 3336.3961095769. The cubic root of 11131539 is about 223.2809839927.

The spelling of 11131539 in words is "eleven million, one hundred thirty-one thousand, five hundred thirty-nine".