213935 has 4 divisors (see below), whose sum is σ = 256728. Its totient is φ = 171144.

The previous prime is 213929. The next prime is 213943. The reversal of 213935 is 539312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213935 - 2⁴ = 213919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213935.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213935.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21389 + ... + 21398.

It is an arithmetic number, because the mean of its divisors is an integer number (64182).

2²¹³⁹³⁵ is an apocalyptic number.

213935 is a deficient number, since it is larger than the sum of its proper divisors (42793).

213935 is an equidigital number, since it uses as much as digits as its factorization.

213935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42792.

The product of its digits is 810, while the sum is 23.

The square root of 213935 is about 462.5310800368. The cubic root of 213935 is about 59.8081837251.

The spelling of 213935 in words is "two hundred thirteen thousand, nine hundred thirty-five".