9855215 has 8 divisors (see below), whose sum is σ = 12234240. Its totient is φ = 7612192.

The previous prime is 9855199. The next prime is 9855217. The reversal of 9855215 is 5125589.

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

It is a cyclic number.

It is not a de Polignac number, because 9855215 - 2⁴ = 9855199 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855217) 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, 33839 + ... + 34128.

It is an arithmetic number, because the mean of its divisors is an integer number (1529280).

Almost surely, 2^9855215 is an apocalyptic number.

9855215 is a deficient number, since it is larger than the sum of its proper divisors (2379025).

9855215 is a wasteful number, since it uses less digits than its factorization.

9855215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68001.

The product of its digits is 18000, while the sum is 35.

The square root of 9855215 is about 3139.3016739396. The cubic root of 9855215 is about 214.3986440728.

The spelling of 9855215 in words is "nine million, eight hundred fifty-five thousand, two hundred fifteen".