228523861 has 2 divisors, whose sum is σ = 228523862. Its totient is φ = 228523860.

The previous prime is 228523829. The next prime is 228523871. The reversal of 228523861 is 168325822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207648100 + 20875761 = 14410^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 228523861 - 2⁵ = 228523829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228523861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228523871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114261930 + 114261931.

It is an arithmetic number, because the mean of its divisors is an integer number (114261931).

Almost surely, 2^228523861 is an apocalyptic number.

It is an amenable number.

228523861 is a deficient number, since it is larger than the sum of its proper divisors (1).

228523861 is an equidigital number, since it uses as much as digits as its factorization.

228523861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 228523861 is about 15117.0056889584. The cubic root of 228523861 is about 611.3790006016.

The spelling of 228523861 in words is "two hundred twenty-eight million, five hundred twenty-three thousand, eight hundred sixty-one".