213895 has 8 divisors (see below), whose sum is σ = 280080. Its totient is φ = 155520.

The previous prime is 213887. The next prime is 213901. The reversal of 213895 is 598312.

213895 = T₂₉₀ + T₂₉₁ + ... + T₂₉₄.

213895 is digitally balanced in base 2, 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 not a de Polignac number, because 213895 - 2³ = 213887 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (35010).

2²¹³⁸⁹⁵ is an apocalyptic number.

213895 is a deficient number, since it is larger than the sum of its proper divisors (66185).

213895 is a wasteful number, since it uses less digits than its factorization.

213895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905.

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

The square root of 213895 is about 462.4878376779. The cubic root of 213895 is about 59.8044559939.

It can be divided in two parts, 21 and 3895, that added together give a triangular number (3916 = T₈₈).

The spelling of 213895 in words is "two hundred thirteen thousand, eight hundred ninety-five".