212813 has 4 divisors (see below), whose sum is σ = 216480. Its totient is φ = 209148.

The previous prime is 212801. The next prime is 212827. The reversal of 212813 is 318212.

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 212813 - 2⁸ = 212557 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 212791 and 212800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212843) 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, 1745 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (54120).

2²¹²⁸¹³ is an apocalyptic number.

It is an amenable number.

212813 is a deficient number, since it is larger than the sum of its proper divisors (3667).

212813 is an equidigital number, since it uses as much as digits as its factorization.

212813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666.

The product of its digits is 96, while the sum is 17.

The square root of 212813 is about 461.3165941086. The cubic root of 212813 is about 59.7034440652.

The spelling of 212813 in words is "two hundred twelve thousand, eight hundred thirteen".