226565661 has 24 divisors (see below), whose sum is σ = 363532320. Its totient is φ = 124999392.

The previous prime is 226565627. The next prime is 226565683. The reversal of 226565661 is 166565622.

It is a happy number.

It is not a de Polignac number, because 226565661 - 2⁹ = 226565149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226565621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22311 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (15147180).

Almost surely, 2^226565661 is an apocalyptic number.

226565661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

226565661 is a deficient number, since it is larger than the sum of its proper divisors (136966659).

226565661 is a wasteful number, since it uses less digits than its factorization.

226565661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53193 (or 53186 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 226565661 is about 15052.0982258288. The cubic root of 226565661 is about 609.6277052830.

Subtracting from 226565661 its sum of digits (39), we obtain a palindrome (226565622).

The spelling of 226565661 in words is "two hundred twenty-six million, five hundred sixty-five thousand, six hundred sixty-one".