2281721768 has 32 divisors (see below), whose sum is σ = 4438748160. Its totient is φ = 1098431040.

The previous prime is 2281721719. The next prime is 2281721773. The reversal of 2281721768 is 8671271822.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25505 + ... + 72207.

It is an arithmetic number, because the mean of its divisors is an integer number (138710880).

Almost surely, 2^2281721768 is an apocalyptic number.

It is an amenable number.

2281721768 is a deficient number, since it is larger than the sum of its proper divisors (2157026392).

2281721768 is a wasteful number, since it uses less digits than its factorization.

2281721768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46937 (or 46933 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 2281721768 is about 47767.3713741922. The cubic root of 2281721768 is about 1316.5000963311.

The spelling of 2281721768 in words is "two billion, two hundred eighty-one million, seven hundred twenty-one thousand, seven hundred sixty-eight".