215011206 has 32 divisors (see below), whose sum is σ = 505910880. Its totient is φ = 67454208.

The previous prime is 215011193. The next prime is 215011211. The reversal of 215011206 is 602110512.

215011206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116191 + ... + 118026.

It is an arithmetic number, because the mean of its divisors is an integer number (15809715).

Almost surely, 2^215011206 is an apocalyptic number.

215011206 is an abundant number, since it is smaller than the sum of its proper divisors (290899674).

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

215011206 is a wasteful number, since it uses less digits than its factorization.

215011206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234245 (or 234239 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 215011206 is about 14663.2604150646. The cubic root of 215011206 is about 599.0830493831.

Adding to 215011206 its reverse (602110512), we get a palindrome (817121718).

The spelling of 215011206 in words is "two hundred fifteen million, eleven thousand, two hundred six".