2163321544 has 8 divisors (see below), whose sum is σ = 4056227910. Its totient is φ = 1081660768.

The previous prime is 2163321533. The next prime is 2163321569. The reversal of 2163321544 is 4451233612.

It can be written as a sum of positive squares in only one way, i.e., 1764840100 + 398481444 = 42010^2 + 19962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 135207589 + ... + 135207604.

Almost surely, 2^2163321544 is an apocalyptic number.

It is an amenable number.

2163321544 is a deficient number, since it is larger than the sum of its proper divisors (1892906366).

2163321544 is a wasteful number, since it uses less digits than its factorization.

2163321544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270415199 (or 270415195 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 2163321544 is about 46511.5205513645. The cubic root of 2163321544 is about 1293.3230718592.

The spelling of 2163321544 in words is "two billion, one hundred sixty-three million, three hundred twenty-one thousand, five hundred forty-four".