11557131 has 8 divisors (see below), whose sum is σ = 15429120. Its totient is φ = 7694952.

The previous prime is 11557129. The next prime is 11557151. The reversal of 11557131 is 13175511.

11557131 is digitally balanced in base 3, 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 not a de Polignac number, because 11557131 - 2¹ = 11557129 is a prime.

It is a super-2 number, since 2×11557131² = 267134553902322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11557151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (1928640).

Almost surely, 2^11557131 is an apocalyptic number.

11557131 is a deficient number, since it is larger than the sum of its proper divisors (3871989).

11557131 is an equidigital number, since it uses as much as digits as its factorization.

11557131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905.

The product of its digits is 525, while the sum is 24.

The square root of 11557131 is about 3399.5780620542. The cubic root of 11557131 is about 226.0910367569.

The spelling of 11557131 in words is "eleven million, five hundred fifty-seven thousand, one hundred thirty-one".