228217901 has 2 divisors, whose sum is σ = 228217902. Its totient is φ = 228217900.

The previous prime is 228217889. The next prime is 228217909. The reversal of 228217901 is 109712822.

It is a happy number.

228217901 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., 130188100 + 98029801 = 11410^2 + 9901^2 .

It is a cyclic number.

It is not a de Polignac number, because 228217901 - 2⁶ = 228217837 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 (228217909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114108950 + 114108951.

It is an arithmetic number, because the mean of its divisors is an integer number (114108951).

Almost surely, 2^228217901 is an apocalyptic number.

It is an amenable number.

228217901 is a deficient number, since it is larger than the sum of its proper divisors (1).

228217901 is an equidigital number, since it uses as much as digits as its factorization.

228217901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 228217901 is about 15106.8825705372. The cubic root of 228217901 is about 611.1060297453.

The spelling of 228217901 in words is "two hundred twenty-eight million, two hundred seventeen thousand, nine hundred one".