2163021243 has 16 divisors (see below), whose sum is σ = 2942355840. Its totient is φ = 1413008064.

The previous prime is 2163021239. The next prime is 2163021277. The reversal of 2163021243 is 3421203612.

2163021243 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2163021243 - 2² = 2163021239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2163021283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35880 + ... + 74922.

It is an arithmetic number, because the mean of its divisors is an integer number (183897240).

Almost surely, 2^2163021243 is an apocalyptic number.

2163021243 is a deficient number, since it is larger than the sum of its proper divisors (779334597).

2163021243 is a wasteful number, since it uses less digits than its factorization.

2163021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39418.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2163021243 is about 46508.2921961235. The cubic root of 2163021243 is about 1293.2632249715.

Adding to 2163021243 its reverse (3421203612), we get a palindrome (5584224855).

The spelling of 2163021243 in words is "two billion, one hundred sixty-three million, twenty-one thousand, two hundred forty-three".