11213646 has 16 divisors (see below), whose sum is σ = 22460544. Its totient is φ = 3732344.

The previous prime is 11213639. The next prime is 11213647. The reversal of 11213646 is 64631211.

It is a super-2 number, since 2×11213646² = 251491713226632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213647) 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, 6175 + ... + 7781.

It is an arithmetic number, because the mean of its divisors is an integer number (1403784).

Almost surely, 2^11213646 is an apocalyptic number.

11213646 is an abundant number, since it is smaller than the sum of its proper divisors (11246898).

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

11213646 is a wasteful number, since it uses less digits than its factorization.

11213646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775.

The product of its digits is 864, while the sum is 24.

The square root of 11213646 is about 3348.6782467117. The cubic root of 11213646 is about 223.8286183785.

Adding to 11213646 its reverse (64631211), we get a palindrome (75844857).

The spelling of 11213646 in words is "eleven million, two hundred thirteen thousand, six hundred forty-six".