228919971 has 16 divisors (see below), whose sum is σ = 350975744. Its totient is φ = 130006944.

The previous prime is 228919969. The next prime is 228919987. The reversal of 228919971 is 179919822.

It is not a de Polignac number, because 228919971 - 2¹ = 228919969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228919971.

It is not an unprimeable number, because it can be changed into a prime (228919991) 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 in 15 ways as a sum of consecutive naturals, for example, 30016 + ... + 36861.

It is an arithmetic number, because the mean of its divisors is an integer number (21935984).

Almost surely, 2^228919971 is an apocalyptic number.

228919971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228919971 is a deficient number, since it is larger than the sum of its proper divisors (122055773).

228919971 is a wasteful number, since it uses less digits than its factorization.

228919971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67050.

The product of its digits is 163296, while the sum is 48.

The square root of 228919971 is about 15130.1014867713. The cubic root of 228919971 is about 611.7320396619.

The spelling of 228919971 in words is "two hundred twenty-eight million, nine hundred nineteen thousand, nine hundred seventy-one".