11881215 has 64 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 5736960.

The previous prime is 11881193. The next prime is 11881223. The reversal of 11881215 is 51218811.

11881215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11881215 - 2¹⁷ = 11750143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71062 + ... + 71228.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^11881215 is an apocalyptic number.

11881215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11881215 is a deficient number, since it is larger than the sum of its proper divisors (11343105).

11881215 is a wasteful number, since it uses less digits than its factorization.

11881215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 223 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 11881215 is about 3446.9138370432. The cubic root of 11881215 is about 228.1849261469.

The spelling of 11881215 in words is "eleven million, eight hundred eighty-one thousand, two hundred fifteen".