215215106 has 8 divisors (see below), whose sum is σ = 323089020. Its totient is φ = 107518768.

The previous prime is 215215103. The next prime is 215215111. The reversal of 215215106 is 601512512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 215062225 + 152881 = 14665^2 + 391^2 .

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

It is not an unprimeable number, because it can be changed into a prime (215215103) 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 3 ways as a sum of consecutive naturals, for example, 41321 + ... + 46236.

Almost surely, 2^215215106 is an apocalyptic number.

215215106 is a deficient number, since it is larger than the sum of its proper divisors (107873914).

215215106 is a wasteful number, since it uses less digits than its factorization.

215215106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88788.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 215215106 is about 14670.2115185842. The cubic root of 215215106 is about 599.2723642300.

Adding to 215215106 its reverse (601512512), we get a palindrome (816727618).

The spelling of 215215106 in words is "two hundred fifteen million, two hundred fifteen thousand, one hundred six".