2228767681 has 4 divisors (see below), whose sum is σ = 2547163072. Its totient is φ = 1910372292.

The previous prime is 2228767679. The next prime is 2228767699. The reversal of 2228767681 is 1867678222.

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.

It is a cyclic number.

It is not a de Polignac number, because 2228767681 - 2¹ = 2228767679 is a prime.

It is a super-2 number, since 2×2228767681² = 9934810751740235522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2228768681) 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 3 ways as a sum of consecutive naturals, for example, 159197685 + ... + 159197698.

It is an arithmetic number, because the mean of its divisors is an integer number (636790768).

Almost surely, 2^2228767681 is an apocalyptic number.

It is an amenable number.

2228767681 is a deficient number, since it is larger than the sum of its proper divisors (318395391).

2228767681 is an equidigital number, since it uses as much as digits as its factorization.

2228767681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318395390.

The product of its digits is 903168, while the sum is 49.

The square root of 2228767681 is about 47209.8261064368. The cubic root of 2228767681 is about 1306.2358547464.

The spelling of 2228767681 in words is "two billion, two hundred twenty-eight million, seven hundred sixty-seven thousand, six hundred eighty-one".