215198 has 4 divisors (see below), whose sum is σ = 322800. Its totient is φ = 107598.

The previous prime is 215197. The next prime is 215239. The reversal of 215198 is 891512.

It is a happy number.

215198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53798 + ... + 53801.

It is an arithmetic number, because the mean of its divisors is an integer number (80700).

2²¹⁵¹⁹⁸ is an apocalyptic number.

215198 is a deficient number, since it is larger than the sum of its proper divisors (107602).

215198 is a wasteful number, since it uses less digits than its factorization.

215198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107601.

The product of its digits is 720, while the sum is 26.

The square root of 215198 is about 463.8943845317. The cubic root of 215198 is about 59.9256486434.

The spelling of 215198 in words is "two hundred fifteen thousand, one hundred ninety-eight".