226813 has 2 divisors, whose sum is σ = 226814. Its totient is φ = 226812.

The previous prime is 226799. The next prime is 226817. The reversal of 226813 is 318622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191844 + 34969 = 438^2 + 187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226813 is a prime.

226813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113406 + 113407.

It is an arithmetic number, because the mean of its divisors is an integer number (113407).

2²²⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

226813 is a deficient number, since it is larger than the sum of its proper divisors (1).

226813 is an equidigital number, since it uses as much as digits as its factorization.

226813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 226813 is about 476.2488845131. The cubic root of 226813 is about 60.9849465676.

Subtracting 226813 from its reverse (318622), we obtain a square (91809 = 303²).

The spelling of 226813 in words is "two hundred twenty-six thousand, eight hundred thirteen".