215342166 has 24 divisors (see below), whose sum is σ = 466364520. Its totient is φ = 66258816.

The previous prime is 215342161. The next prime is 215342167. The reversal of 215342166 is 661243512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215342161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105171 + ... + 107198.

It is an arithmetic number, because the mean of its divisors is an integer number (19431855).

Almost surely, 2^215342166 is an apocalyptic number.

215342166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

215342166 is an abundant number, since it is smaller than the sum of its proper divisors (251022354).

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

215342166 is a wasteful number, since it uses less digits than its factorization.

215342166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212400 (or 212387 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 215342166 is about 14674.5414238401. The cubic root of 215342166 is about 599.3902750468.

Adding to 215342166 its reverse (661243512), we get a palindrome (876585678).

The spelling of 215342166 in words is "two hundred fifteen million, three hundred forty-two thousand, one hundred sixty-six".