215078 has 8 divisors (see below), whose sum is σ = 333120. Its totient is φ = 104040.

The previous prime is 215077. The next prime is 215087. The reversal of 215078 is 870512.

215078 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215077) 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, 1673 + ... + 1796.

It is an arithmetic number, because the mean of its divisors is an integer number (41640).

2²¹⁵⁰⁷⁸ is an apocalyptic number.

215078 is a deficient number, since it is larger than the sum of its proper divisors (118042).

215078 is a wasteful number, since it uses less digits than its factorization.

215078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 215078 is about 463.7650267107. The cubic root of 215078 is about 59.9145078724.

The spelling of 215078 in words is "two hundred fifteen thousand, seventy-eight".