11215863 has 6 divisors (see below), whose sum is σ = 16200704. Its totient is φ = 7477236.

The previous prime is 11215829. The next prime is 11215889. The reversal of 11215863 is 36851211.

It is not a de Polignac number, because 11215863 - 2²² = 7021559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623095 + ... + 623112.

Almost surely, 2^11215863 is an apocalyptic number.

11215863 is a deficient number, since it is larger than the sum of its proper divisors (4984841).

11215863 is a wasteful number, since it uses less digits than its factorization.

11215863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246213 (or 1246210 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11215863 is about 3349.0092564817. The cubic root of 11215863 is about 223.8433681262.

The spelling of 11215863 in words is "eleven million, two hundred fifteen thousand, eight hundred sixty-three".