11217138 has 16 divisors (see below), whose sum is σ = 22467456. Its totient is φ = 3733520.

The previous prime is 11217121. The next prime is 11217181. The reversal of 11217138 is 83171211.

It is a happy number.

11217138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11217138² = 251648369822088, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6295 + ... + 7877.

It is an arithmetic number, because the mean of its divisors is an integer number (1404216).

Almost surely, 2^11217138 is an apocalyptic number.

11217138 is an abundant number, since it is smaller than the sum of its proper divisors (11250318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11217138 is a wasteful number, since it uses less digits than its factorization.

11217138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769.

The product of its digits is 336, while the sum is 24.

The square root of 11217138 is about 3349.1996058760. The cubic root of 11217138 is about 223.8518498477.

Adding to 11217138 its reverse (83171211), we get a palindrome (94388349).

The spelling of 11217138 in words is "eleven million, two hundred seventeen thousand, one hundred thirty-eight".