228971563 has 2 divisors, whose sum is σ = 228971564. Its totient is φ = 228971562.

The previous prime is 228971539. The next prime is 228971579. The reversal of 228971563 is 365179822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228971563 - 2⁵ = 228971531 is a prime.

It is not a weakly prime, because it can be changed into another prime (228971513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114485781 + 114485782.

It is an arithmetic number, because the mean of its divisors is an integer number (114485782).

Almost surely, 2^228971563 is an apocalyptic number.

228971563 is a deficient number, since it is larger than the sum of its proper divisors (1).

228971563 is an equidigital number, since it uses as much as digits as its factorization.

228971563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 228971563 is about 15131.8063363235. The cubic root of 228971563 is about 611.7779918326. Note that the first 3 decimals are identical.

The spelling of 228971563 in words is "two hundred twenty-eight million, nine hundred seventy-one thousand, five hundred sixty-three".