11289531 has 8 divisors (see below), whose sum is σ = 16421184. Its totient is φ = 6842120.

The previous prime is 11289517. The next prime is 11289559. The reversal of 11289531 is 13598211.

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

It is a cyclic number.

It is not a de Polignac number, because 11289531 - 2¹¹ = 11287483 is a prime.

It is a super-2 number, since 2×11289531² = 254907020399922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11289511) 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, 171021 + ... + 171086.

It is an arithmetic number, because the mean of its divisors is an integer number (2052648).

Almost surely, 2^11289531 is an apocalyptic number.

11289531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11289531 is a deficient number, since it is larger than the sum of its proper divisors (5131653).

11289531 is a wasteful number, since it uses less digits than its factorization.

11289531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342121.

The product of its digits is 2160, while the sum is 30.

The square root of 11289531 is about 3359.9897321272. The cubic root of 11289531 is about 224.3323815000.

The spelling of 11289531 in words is "eleven million, two hundred eighty-nine thousand, five hundred thirty-one".