11131557 has 8 divisors (see below), whose sum is σ = 14865120. Its totient is φ = 7409520.

The previous prime is 11131553. The next prime is 11131559. The reversal of 11131557 is 75513111.

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

It is not a de Polignac number, because 11131557 - 2² = 11131553 is a prime.

It is a super-2 number, since 2×11131557² = 247823122488498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131553) 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, 294 + ... + 4727.

It is an arithmetic number, because the mean of its divisors is an integer number (1858140).

Almost surely, 2^11131557 is an apocalyptic number.

It is an amenable number.

11131557 is a deficient number, since it is larger than the sum of its proper divisors (3733563).

11131557 is an equidigital number, since it uses as much as digits as its factorization.

11131557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763.

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

The square root of 11131557 is about 3336.3988070973. The cubic root of 11131557 is about 223.2811043431.

Adding to 11131557 its reverse (75513111), we get a palindrome (86644668).

The spelling of 11131557 in words is "eleven million, one hundred thirty-one thousand, five hundred fifty-seven".