213357 has 4 divisors (see below), whose sum is σ = 284480. Its totient is φ = 142236.

The previous prime is 213349. The next prime is 213359. The reversal of 213357 is 753312.

It is a happy number.

213357 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 Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213357 - 2³ = 213349 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213359) 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, 35557 + ... + 35562.

It is an arithmetic number, because the mean of its divisors is an integer number (71120).

2²¹³³⁵⁷ is an apocalyptic number.

It is an amenable number.

213357 is a deficient number, since it is larger than the sum of its proper divisors (71123).

213357 is an equidigital number, since it uses as much as digits as its factorization.

213357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71122.

The product of its digits is 630, while the sum is 21.

The square root of 213357 is about 461.9058345594. The cubic root of 213357 is about 59.7542727872.

Adding to 213357 its reverse (753312), we get a palindrome (966669).

The spelling of 213357 in words is "two hundred thirteen thousand, three hundred fifty-seven".