228621571 has 2 divisors, whose sum is σ = 228621572. Its totient is φ = 228621570.

The previous prime is 228621553. The next prime is 228621629. The reversal of 228621571 is 175126822.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228621571 - 2⁵ = 228621539 is a prime.

It is not a weakly prime, because it can be changed into another prime (228621511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114310785 + 114310786.

It is an arithmetic number, because the mean of its divisors is an integer number (114310786).

Almost surely, 2^228621571 is an apocalyptic number.

228621571 is a deficient number, since it is larger than the sum of its proper divisors (1).

228621571 is an equidigital number, since it uses as much as digits as its factorization.

228621571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 228621571 is about 15120.2371343838. The cubic root of 228621571 is about 611.4661240058.

The spelling of 228621571 in words is "two hundred twenty-eight million, six hundred twenty-one thousand, five hundred seventy-one".