11381611 has 4 divisors (see below), whose sum is σ = 11411712. Its totient is φ = 11351512.

The previous prime is 11381597. The next prime is 11381621. The reversal of 11381611 is 11618311.

11381611 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11618311 = 457 ⋅25423.

It is a cyclic number.

It is not a de Polignac number, because 11381611 - 2¹⁷ = 11250539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11381621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14476 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (2852928).

Almost surely, 2^11381611 is an apocalyptic number.

11381611 is a deficient number, since it is larger than the sum of its proper divisors (30101).

11381611 is an equidigital number, since it uses as much as digits as its factorization.

11381611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30100.

The product of its digits is 144, while the sum is 22.

The square root of 11381611 is about 3373.6643282935. The cubic root of 11381611 is about 224.9406328968.

Adding to 11381611 its reverse (11618311), we get a palindrome (22999922).

The spelling of 11381611 in words is "eleven million, three hundred eighty-one thousand, six hundred eleven".