228056867809 has 3 divisors (see below), whose sum is σ = 228057345363. Its totient is φ = 228056390256.

The previous prime is 228056867791. The next prime is 228056867861. The reversal of 228056867809 is 908768650822.

The square root of 228056867809 is 477553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908768650822 = 2 ⋅454384325411.

It can be written as a sum of positive squares in only one way, i.e., 172137861025 + 55919006784 = 414895^2 + 236472^2 .

It is not a de Polignac number, because 228056867809 - 2⁵ = 228056867777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228056867869) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 238777 + ... + 716329.

It is an arithmetic number, because the mean of its divisors is an integer number (76019115121).

Almost surely, 2^228056867809 is an apocalyptic number.

228056867809 is the 477553-rd square number.

228056867809 is the 238777-th centered octagonal number.

It is an amenable number.

228056867809 is a deficient number, since it is larger than the sum of its proper divisors (477554).

228056867809 is an frugal number, since it uses more digits than its factorization.

228056867809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955106 (or 477553 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 228056867809 in words is "two hundred twenty-eight billion, fifty-six million, eight hundred sixty-seven thousand, eight hundred nine".