228231071 has 2 divisors, whose sum is σ = 228231072. Its totient is φ = 228231070.

The previous prime is 228231053. The next prime is 228231109. The reversal of 228231071 is 170132822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228231071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228231071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228231041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114115535 + 114115536.

It is an arithmetic number, because the mean of its divisors is an integer number (114115536).

Almost surely, 2^228231071 is an apocalyptic number.

228231071 is a deficient number, since it is larger than the sum of its proper divisors (1).

228231071 is an equidigital number, since it uses as much as digits as its factorization.

228231071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 228231071 is about 15107.3184582837. The cubic root of 228231071 is about 611.1177847560.

Adding to 228231071 its reverse (170132822), we get a palindrome (398363893).

The spelling of 228231071 in words is "two hundred twenty-eight million, two hundred thirty-one thousand, seventy-one".