226636321 has 4 divisors (see below), whose sum is σ = 230912532. Its totient is φ = 222360112.

The previous prime is 226636309. The next prime is 226636337. The reversal of 226636321 is 123636622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173185600 + 53450721 = 13160^2 + 7311^2 .

It is a cyclic number.

It is not a de Polignac number, because 226636321 - 2⁹ = 226635809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226636621) 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, 2138026 + ... + 2138131.

It is an arithmetic number, because the mean of its divisors is an integer number (57728133).

Almost surely, 2^226636321 is an apocalyptic number.

It is an amenable number.

226636321 is a deficient number, since it is larger than the sum of its proper divisors (4276211).

226636321 is an equidigital number, since it uses as much as digits as its factorization.

226636321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276210.

The product of its digits is 15552, while the sum is 31.

The square root of 226636321 is about 15054.4452239197. The cubic root of 226636321 is about 609.6910744275.

The spelling of 226636321 in words is "two hundred twenty-six million, six hundred thirty-six thousand, three hundred twenty-one".