11215771 has 8 divisors (see below), whose sum is σ = 12911360. Its totient is φ = 9543528.

The previous prime is 11215759. The next prime is 11215781. The reversal of 11215771 is 17751211.

11215771 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 a cyclic number.

It is not a de Polignac number, because 11215771 - 2⁵ = 11215739 is a prime.

It is a super-4 number, since 4×11215771⁴ (a number of 29 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (11215741) 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, 4791 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (1613920).

Almost surely, 2^11215771 is an apocalyptic number.

11215771 is a deficient number, since it is larger than the sum of its proper divisors (1695589).

11215771 is a wasteful number, since it uses less digits than its factorization.

11215771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11673.

The product of its digits is 490, while the sum is 25.

The square root of 11215771 is about 3348.9955210481. The cubic root of 11215771 is about 223.8427560869.

Adding to 11215771 its reverse (17751211), we get a palindrome (28966982).

The spelling of 11215771 in words is "eleven million, two hundred fifteen thousand, seven hundred seventy-one".