215606106 has 12 divisors (see below), whose sum is σ = 467146602. Its totient is φ = 71868696.

The previous prime is 215606099. The next prime is 215606123. The reversal of 215606106 is 601606512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 81162081 = 11595^2 + 9009^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215606106.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5989041 + ... + 5989076.

Almost surely, 2^215606106 is an apocalyptic number.

215606106 is an abundant number, since it is smaller than the sum of its proper divisors (251540496).

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

215606106 is a wasteful number, since it uses less digits than its factorization.

215606106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11978125 (or 11978122 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 215606106 is about 14683.5317958589. The cubic root of 215606106 is about 599.6350614114.

The spelling of 215606106 in words is "two hundred fifteen million, six hundred six thousand, one hundred six".