213607 has 4 divisors (see below), whose sum is σ = 214776. Its totient is φ = 212440.

The previous prime is 213599. The next prime is 213611. The reversal of 213607 is 706312.

213607 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213607 - 2³ = 213599 is a prime.

It is a Duffinian number.

213607 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (53694).

2²¹³⁶⁰⁷ is an apocalyptic number.

213607 is a deficient number, since it is larger than the sum of its proper divisors (1169).

213607 is an equidigital number, since it uses as much as digits as its factorization.

213607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

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

The square root of 213607 is about 462.1763732603. The cubic root of 213607 is about 59.7776026011. Note that the first 3 decimals are identical.

Adding to 213607 its reverse (706312), we get a palindrome (919919).

It can be divided in two parts, 213 and 607, that added together give a triangular number (820 = T₄₀).

The spelling of 213607 in words is "two hundred thirteen thousand, six hundred seven".