228245861 has 2 divisors, whose sum is σ = 228245862. Its totient is φ = 228245860.

The previous prime is 228245851. The next prime is 228245867. The reversal of 228245861 is 168542822.

228245861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193376836 + 34869025 = 13906^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 228245861 - 2²² = 224051557 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 (228245867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114122930 + 114122931.

It is an arithmetic number, because the mean of its divisors is an integer number (114122931).

Almost surely, 2^228245861 is an apocalyptic number.

It is an amenable number.

228245861 is a deficient number, since it is larger than the sum of its proper divisors (1).

228245861 is an equidigital number, since it uses as much as digits as its factorization.

228245861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 38.

The square root of 228245861 is about 15107.8079482101. The cubic root of 228245861 is about 611.1309851743.

The spelling of 228245861 in words is "two hundred twenty-eight million, two hundred forty-five thousand, eight hundred sixty-one".