226572161 has 2 divisors, whose sum is σ = 226572162. Its totient is φ = 226572160.

The previous prime is 226572139. The next prime is 226572163. The reversal of 226572161 is 161275622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208253761 + 18318400 = 14431^2 + 4280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226572161 is a prime.

Together with 226572163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (226572163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113286080 + 113286081.

It is an arithmetic number, because the mean of its divisors is an integer number (113286081).

Almost surely, 2^226572161 is an apocalyptic number.

It is an amenable number.

226572161 is a deficient number, since it is larger than the sum of its proper divisors (1).

226572161 is an equidigital number, since it uses as much as digits as its factorization.

226572161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 226572161 is about 15052.3141410216. The cubic root of 226572161 is about 609.6335351488.

The spelling of 226572161 in words is "two hundred twenty-six million, five hundred seventy-two thousand, one hundred sixty-one".