226581 has 4 divisors (see below), whose sum is σ = 302112. Its totient is φ = 151052.

The previous prime is 226571. The next prime is 226601. The reversal of 226581 is 185622.

226581 is digitally balanced in base 7, 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 a cyclic number.

It is not a de Polignac number, because 226581 - 2⁵ = 226549 is a prime.

It is a super-2 number, since 2×226581² = 102677899122, which contains 22 as substring.

It is a D-number.

226581 is strictly pandigital in base 7.

226581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226511) 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, 37761 + ... + 37766.

It is an arithmetic number, because the mean of its divisors is an integer number (75528).

2²²⁶⁵⁸¹ is an apocalyptic number.

It is an amenable number.

226581 is a deficient number, since it is larger than the sum of its proper divisors (75531).

226581 is an equidigital number, since it uses as much as digits as its factorization.

226581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75530.

The product of its digits is 960, while the sum is 24.

The square root of 226581 is about 476.0052520719. The cubic root of 226581 is about 60.9641462691.

It can be divided in two parts, 2265 and 81, that added together give a triangular number (2346 = T₆₈).

The spelling of 226581 in words is "two hundred twenty-six thousand, five hundred eighty-one".