226188509 has 4 divisors (see below), whose sum is σ = 236022816. Its totient is φ = 216354204.

The previous prime is 226188497. The next prime is 226188541. The reversal of 226188509 is 905881622.

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, and also an emirpimes, since its reverse is a distinct semiprime: 905881622 = 2 ⋅452940811.

It is a cyclic number.

It is not a de Polignac number, because 226188509 - 2¹⁶ = 226122973 is a prime.

It is a super-2 number, since 2×226188509² = 102322483207286162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226188569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4917119 + ... + 4917164.

It is an arithmetic number, because the mean of its divisors is an integer number (59005704).

Almost surely, 2^226188509 is an apocalyptic number.

It is an amenable number.

226188509 is a deficient number, since it is larger than the sum of its proper divisors (9834307).

226188509 is an equidigital number, since it uses as much as digits as its factorization.

226188509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834306.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 226188509 is about 15039.5647875861. The cubic root of 226188509 is about 609.2892456281.

The spelling of 226188509 in words is "two hundred twenty-six million, one hundred eighty-eight thousand, five hundred nine".