11215887 has 16 divisors (see below), whose sum is σ = 15332352. Its totient is φ = 7290720.

The previous prime is 11215829. The next prime is 11215889. The reversal of 11215887 is 78851211.

It is not a de Polignac number, because 11215887 - 2⁶ = 11215823 is a prime.

It is a super-2 number, since 2×11215887² = 251592242393538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30378 + ... + 30744.

It is an arithmetic number, because the mean of its divisors is an integer number (958272).

Almost surely, 2^11215887 is an apocalyptic number.

11215887 is a deficient number, since it is larger than the sum of its proper divisors (4116465).

11215887 is a wasteful number, since it uses less digits than its factorization.

11215887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its digits is 4480, while the sum is 33.

The square root of 11215887 is about 3349.0128396290. The cubic root of 11215887 is about 223.8435277881.

The spelling of 11215887 in words is "eleven million, two hundred fifteen thousand, eight hundred eighty-seven".