228220061 has 2 divisors, whose sum is σ = 228220062. Its totient is φ = 228220060.

The previous prime is 228220021. The next prime is 228220079. The reversal of 228220061 is 160022822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134420836 + 93799225 = 11594^2 + 9685^2 .

It is a cyclic number.

It is not a de Polignac number, because 228220061 - 2¹⁰ = 228219037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114110030 + 114110031.

It is an arithmetic number, because the mean of its divisors is an integer number (114110031).

Almost surely, 2^228220061 is an apocalyptic number.

It is an amenable number.

228220061 is a deficient number, since it is larger than the sum of its proper divisors (1).

228220061 is an equidigital number, since it uses as much as digits as its factorization.

228220061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 228220061 is about 15106.9540609615. The cubic root of 228220061 is about 611.1079577052.

Adding to 228220061 its reverse (160022822), we get a palindrome (388242883).

The spelling of 228220061 in words is "two hundred twenty-eight million, two hundred twenty thousand, sixty-one".