11618213 has 4 divisors (see below), whose sum is σ = 11888448. Its totient is φ = 11347980.

The previous prime is 11618207. The next prime is 11618231. The reversal of 11618213 is 31281611.

11618213 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11618213 - 2¹⁸ = 11356069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11618203) 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, 135053 + ... + 135138.

It is an arithmetic number, because the mean of its divisors is an integer number (2972112).

Almost surely, 2^11618213 is an apocalyptic number.

It is an amenable number.

11618213 is a deficient number, since it is larger than the sum of its proper divisors (270235).

11618213 is an equidigital number, since it uses as much as digits as its factorization.

11618213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270234.

The product of its digits is 288, while the sum is 23.

The square root of 11618213 is about 3408.5499849643. The cubic root of 11618213 is about 226.4886508388.

Adding to 11618213 its reverse (31281611), we get a palindrome (42899824).

The spelling of 11618213 in words is "eleven million, six hundred eighteen thousand, two hundred thirteen".