215398 has 4 divisors (see below), whose sum is σ = 323100. Its totient is φ = 107698.

The previous prime is 215393. The next prime is 215399. The reversal of 215398 is 893512.

215398 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53848 + ... + 53851.

It is an arithmetic number, because the mean of its divisors is an integer number (80775).

2²¹⁵³⁹⁸ is an apocalyptic number.

215398 is a deficient number, since it is larger than the sum of its proper divisors (107702).

215398 is a wasteful number, since it uses less digits than its factorization.

215398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107701.

The product of its digits is 2160, while the sum is 28.

The square root of 215398 is about 464.1099007778. The cubic root of 215398 is about 59.9442073951.

It can be divided in two parts, 2 and 15398, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 215398 in words is "two hundred fifteen thousand, three hundred ninety-eight".