226516021 has 4 divisors (see below), whose sum is σ = 232040844. Its totient is φ = 220991200.

The previous prime is 226515953. The next prime is 226516027. The reversal of 226516021 is 120615622.

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 46580625 + 179935396 = 6825^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 226516021 - 2²⁵ = 192961589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226516027) 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, 2762350 + ... + 2762431.

It is an arithmetic number, because the mean of its divisors is an integer number (58010211).

Almost surely, 2^226516021 is an apocalyptic number.

It is an amenable number.

226516021 is a deficient number, since it is larger than the sum of its proper divisors (5524823).

226516021 is an equidigital number, since it uses as much as digits as its factorization.

226516021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5524822.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 226516021 is about 15050.4491959543. The cubic root of 226516021 is about 609.5831793687.

The spelling of 226516021 in words is "two hundred twenty-six million, five hundred sixteen thousand, twenty-one".