2163505212 has 144 divisors (see below), whose sum is σ = 6440878080. Its totient is φ = 605404800.

The previous prime is 2163505193. The next prime is 2163505229. The reversal of 2163505212 is 2125053612.

It is a happy number.

2163505212 is a `hidden beast` number, since 2 + 1 + 635 + 0 + 5 + 21 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260037 + ... + 268227.

It is an arithmetic number, because the mean of its divisors is an integer number (44728320).

Almost surely, 2^2163505212 is an apocalyptic number.

2163505212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163505212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3220439040).

2163505212 is an abundant number, since it is smaller than the sum of its proper divisors (4277372868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2163505212 is a wasteful number, since it uses less digits than its factorization.

2163505212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264 (or 8259 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2163505212 is about 46513.4949450157. The cubic root of 2163505212 is about 1293.3596722651.

Adding to 2163505212 its reverse (2125053612), we get a palindrome (4288558824).

The spelling of 2163505212 in words is "two billion, one hundred sixty-three million, five hundred five thousand, two hundred twelve".