213773 has 4 divisors (see below), whose sum is σ = 244320. Its totient is φ = 183228.

The previous prime is 213751. The next prime is 213791. The reversal of 213773 is 377312.

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 a cyclic number.

It is not a de Polignac number, because 213773 - 2¹⁴ = 197389 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 7 + 3⁹ + 7⁵ + 3¹¹ .

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213713) 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, 15263 + ... + 15276.

It is an arithmetic number, because the mean of its divisors is an integer number (61080).

2²¹³⁷⁷³ is an apocalyptic number.

It is an amenable number.

213773 is a deficient number, since it is larger than the sum of its proper divisors (30547).

213773 is an equidigital number, since it uses as much as digits as its factorization.

213773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30546.

The product of its digits is 882, while the sum is 23.

The square root of 213773 is about 462.3559235048. The cubic root of 213773 is about 59.7930835429.

The spelling of 213773 in words is "two hundred thirteen thousand, seven hundred seventy-three".