215066 has 8 divisors (see below), whose sum is σ = 324864. Its totient is φ = 106780.

The previous prime is 215063. The next prime is 215077. The reversal of 215066 is 660512.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (215063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (40608).

2²¹⁵⁰⁶⁶ is an apocalyptic number.

215066 is a deficient number, since it is larger than the sum of its proper divisors (109798).

215066 is a wasteful number, since it uses less digits than its factorization.

215066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 215066 is about 463.7520889441. The cubic root of 215066 is about 59.9133935674.

Adding to 215066 its reverse (660512), we get a palindrome (875578).

It can be divided in two parts, 21506 and 6, that added together give a palindrome (21512).

The spelling of 215066 in words is "two hundred fifteen thousand, sixty-six".