10855215 has 60 divisors (see below), whose sum is σ = 22677336. Its totient is φ = 4953312.

The previous prime is 10855211. The next prime is 10855219. The reversal of 10855215 is 51255801.

10855215 is a `hidden beast` number, since 108 + 552 + 1 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (10855211) and next prime (10855219).

It is not a de Polignac number, because 10855215 - 2² = 10855211 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 not an unprimeable number, because it can be changed into a prime (10855211) 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 59 ways as a sum of consecutive naturals, for example, 19572 + ... + 20118.

Almost surely, 2^10855215 is an apocalyptic number.

10855215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10855215 is an abundant number, since it is smaller than the sum of its proper divisors (11822121).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10855215 is an equidigital number, since it uses as much as digits as its factorization.

10855215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 10855215 is about 3294.7253299782. The cubic root of 10855215 is about 221.4179420099.

The spelling of 10855215 in words is "ten million, eight hundred fifty-five thousand, two hundred fifteen".