2163545218 has 4 divisors (see below), whose sum is σ = 3245317830. Its totient is φ = 1081772608.

The previous prime is 2163545213. The next prime is 2163545227. The reversal of 2163545218 is 8125453612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2138415049 + 25130169 = 46243^2 + 5013^2 .

It is not an unprimeable number, because it can be changed into a prime (2163545213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540886303 + ... + 540886306.

Almost surely, 2^2163545218 is an apocalyptic number.

2163545218 is a deficient number, since it is larger than the sum of its proper divisors (1081772612).

2163545218 is a wasteful number, since it uses less digits than its factorization.

2163545218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081772611.

The product of its digits is 57600, while the sum is 37.

The square root of 2163545218 is about 46513.9249902650. The cubic root of 2163545218 is about 1293.3676441784.

The spelling of 2163545218 in words is "two billion, one hundred sixty-three million, five hundred forty-five thousand, two hundred eighteen".