228519077 has 4 divisors (see below), whose sum is σ = 228679980. Its totient is φ = 228358176.

The previous prime is 228519059. The next prime is 228519079. The reversal of 228519077 is 770915822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149059681 + 79459396 = 12209^2 + 8914^2 .

It is a cyclic number.

It is not a de Polignac number, because 228519077 - 2²⁶ = 161410213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228519079) 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 in 3 ways as a sum of consecutive naturals, for example, 78302 + ... + 81167.

It is an arithmetic number, because the mean of its divisors is an integer number (57169995).

Almost surely, 2^228519077 is an apocalyptic number.

It is an amenable number.

228519077 is a deficient number, since it is larger than the sum of its proper divisors (160903).

228519077 is a wasteful number, since it uses less digits than its factorization.

228519077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160902.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 228519077 is about 15116.8474557363. The cubic root of 228519077 is about 611.3747342965.

The spelling of 228519077 in words is "two hundred twenty-eight million, five hundred nineteen thousand, seventy-seven".