215106 has 8 divisors (see below), whose sum is σ = 430224. Its totient is φ = 71700.

The previous prime is 215087. The next prime is 215123. The reversal of 215106 is 601512.

215106 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

215106 is an admirable number.

It is an unprimeable number.

215106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17920 + ... + 17931.

It is an arithmetic number, because the mean of its divisors is an integer number (53778).

2²¹⁵¹⁰⁶ is an apocalyptic number.

215106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215106 is a wasteful number, since it uses less digits than its factorization.

215106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35856.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 215106 is about 463.7952134294. The cubic root of 215106 is about 59.9171077562.

Adding to 215106 its reverse (601512), we get a palindrome (816618).

The spelling of 215106 in words is "two hundred fifteen thousand, one hundred six".