228219877 has 4 divisors (see below), whose sum is σ = 233527360. Its totient is φ = 222912396.

The previous prime is 228219863. The next prime is 228219907. The reversal of 228219877 is 778912822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 778912822 = 2 ⋅389456411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228219877 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 (228219977) 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, 2653677 + ... + 2653762.

It is an arithmetic number, because the mean of its divisors is an integer number (58381840).

Almost surely, 2^228219877 is an apocalyptic number.

It is an amenable number.

228219877 is a deficient number, since it is larger than the sum of its proper divisors (5307483).

228219877 is an equidigital number, since it uses as much as digits as its factorization.

228219877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307482.

The product of its digits is 225792, while the sum is 46.

The square root of 228219877 is about 15106.9479710496. The cubic root of 228219877 is about 611.1077934720.

The spelling of 228219877 in words is "two hundred twenty-eight million, two hundred nineteen thousand, eight hundred seventy-seven".