215188 has 12 divisors (see below), whose sum is σ = 393120. Its totient is φ = 102872.

The previous prime is 215183. The next prime is 215191. The reversal of 215188 is 881512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215183) 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, 1078 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2²¹⁵¹⁸⁸ is an apocalyptic number.

It is an amenable number.

215188 is a deficient number, since it is larger than the sum of its proper divisors (177932).

215188 is a wasteful number, since it uses less digits than its factorization.

215188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2364 counting only the distinct ones).

The product of its digits is 640, while the sum is 25.

The square root of 215188 is about 463.8836060910. The cubic root of 215188 is about 59.9247204040.

The spelling of 215188 in words is "two hundred fifteen thousand, one hundred eighty-eight".