215006211 has 32 divisors (see below), whose sum is σ = 364715520. Its totient is φ = 122630112.

The previous prime is 215006189. The next prime is 215006219. The reversal of 215006211 is 112600512.

It is not a de Polignac number, because 215006211 - 2⁵ = 215006179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215006219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190896 + ... + 192018.

It is an arithmetic number, because the mean of its divisors is an integer number (11397360).

Almost surely, 2^215006211 is an apocalyptic number.

215006211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215006211 is a deficient number, since it is larger than the sum of its proper divisors (149709309).

215006211 is a wasteful number, since it uses less digits than its factorization.

215006211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2146 counting only the distinct ones).

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

The square root of 215006211 is about 14663.0900904277. The cubic root of 215006211 is about 599.0784101784.

Adding to 215006211 its reverse (112600512), we get a palindrome (327606723).

The spelling of 215006211 in words is "two hundred fifteen million, six thousand, two hundred eleven".