11215541 has 8 divisors (see below), whose sum is σ = 11434080. Its totient is φ = 10999152.

The previous prime is 11215531. The next prime is 11215549. The reversal of 11215541 is 14551211.

11215541 is digitally balanced in base 2 and base 3, because in such bases 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 11215541 - 2¹⁴ = 11199157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215549) 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, 13115 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (1429260).

Almost surely, 2^11215541 is an apocalyptic number.

It is an amenable number.

11215541 is a deficient number, since it is larger than the sum of its proper divisors (218539).

11215541 is an equidigital number, since it uses as much as digits as its factorization.

11215541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075.

The product of its digits is 200, while the sum is 20.

The square root of 11215541 is about 3348.9611822176. The cubic root of 11215541 is about 223.8412259741.

Adding to 11215541 its reverse (14551211), we get a palindrome (25766752).

The spelling of 11215541 in words is "eleven million, two hundred fifteen thousand, five hundred forty-one".