213670 has 16 divisors (see below), whose sum is σ = 401760. Its totient is φ = 81664.

The previous prime is 213659. The next prime is 213713. The reversal of 213670 is 76312.

213670 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

213670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235 + ... + 694.

It is an arithmetic number, because the mean of its divisors is an integer number (25110).

2²¹³⁶⁷⁰ is an apocalyptic number.

213670 is a deficient number, since it is larger than the sum of its proper divisors (188090).

213670 is a wasteful number, since it uses less digits than its factorization.

213670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 213670 is about 462.2445240346. The cubic root of 213670 is about 59.7834788423.

Adding to 213670 its reverse (76312), we get a palindrome (289982).

The spelling of 213670 in words is "two hundred thirteen thousand, six hundred seventy".