2271981646 has 8 divisors (see below), whose sum is σ = 3717788184. Its totient is φ = 1032718920.

The previous prime is 2271981641. The next prime is 2271981671. The reversal of 2271981646 is 6461891722.

2271981646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2271981596 and 2271981605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271981641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51635925 + ... + 51635968.

It is an arithmetic number, because the mean of its divisors is an integer number (464723523).

Almost surely, 2^2271981646 is an apocalyptic number.

2271981646 is a deficient number, since it is larger than the sum of its proper divisors (1445806538).

2271981646 is a wasteful number, since it uses less digits than its factorization.

2271981646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103271906.

The product of its digits is 290304, while the sum is 46.

The square root of 2271981646 is about 47665.3086216800. The cubic root of 2271981646 is about 1314.6241502736.

The spelling of 2271981646 in words is "two billion, two hundred seventy-one million, nine hundred eighty-one thousand, six hundred forty-six".