228583561 has 2 divisors, whose sum is σ = 228583562. Its totient is φ = 228583560.

The previous prime is 228583559. The next prime is 228583567. The reversal of 228583561 is 165385822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214476025 + 14107536 = 14645^2 + 3756^2 .

It is a cyclic number.

It is not a de Polignac number, because 228583561 - 2¹ = 228583559 is a prime.

Together with 228583559, it forms a pair of twin primes.

It is equal to p_12568936 and since 228583561 and 12568936 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (228583567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114291780 + 114291781.

It is an arithmetic number, because the mean of its divisors is an integer number (114291781).

Almost surely, 2^228583561 is an apocalyptic number.

It is an amenable number.

228583561 is a deficient number, since it is larger than the sum of its proper divisors (1).

228583561 is an equidigital number, since it uses as much as digits as its factorization.

228583561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 228583561 is about 15118.9801574048. The cubic root of 228583561 is about 611.4322352299.

The spelling of 228583561 in words is "two hundred twenty-eight million, five hundred eighty-three thousand, five hundred sixty-one".