11820215 has 8 divisors (see below), whose sum is σ = 15473808. Its totient is φ = 8596480.

The previous prime is 11820209. The next prime is 11820239. The reversal of 11820215 is 51202811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11820215 - 2⁴ = 11820199 is a prime.

It is a Duffinian number.

It is a congruent 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, 107402 + ... + 107511.

It is an arithmetic number, because the mean of its divisors is an integer number (1934226).

Almost surely, 2^11820215 is an apocalyptic number.

11820215 is a deficient number, since it is larger than the sum of its proper divisors (3653593).

11820215 is a wasteful number, since it uses less digits than its factorization.

11820215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214929.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11820215 is about 3438.0539553649. The cubic root of 11820215 is about 227.7937436536.

The spelling of 11820215 in words is "eleven million, eight hundred twenty thousand, two hundred fifteen".