226921 has 4 divisors (see below), whose sum is σ = 233092. Its totient is φ = 220752.

The previous prime is 226913. The next prime is 226937. The reversal of 226921 is 129622.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129622 = 2 ⋅64811.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 14400 = 461^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 226921 - 2³ = 226913 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 226892 and 226901.

It is not an unprimeable number, because it can be changed into a prime (226901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030 + ... + 3103.

It is an arithmetic number, because the mean of its divisors is an integer number (58273).

2²²⁶⁹²¹ is an apocalyptic number.

It is an amenable number.

226921 is a deficient number, since it is larger than the sum of its proper divisors (6171).

226921 is an equidigital number, since it uses as much as digits as its factorization.

226921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170.

The product of its digits is 432, while the sum is 22.

The square root of 226921 is about 476.3622571111. The cubic root of 226921 is about 60.9946246271.

The spelling of 226921 in words is "two hundred twenty-six thousand, nine hundred twenty-one".