2125543212 has 72 divisors (see below), whose sum is σ = 5851329120. Its totient is φ = 646652160.

The previous prime is 2125543193. The next prime is 2125543219. The reversal of 2125543212 is 2123455212.

2125543212 is a `hidden beast` number, since 212 + 5 + 5 + 432 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (2125543219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16137 + ... + 67167.

It is an arithmetic number, because the mean of its divisors is an integer number (81268460).

Almost surely, 2^2125543212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2125543212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2925664560).

2125543212 is an abundant number, since it is smaller than the sum of its proper divisors (3725785908).

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

2125543212 is a wasteful number, since it uses less digits than its factorization.

2125543212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51143 (or 51138 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2125543212 is about 46103.6138713659. The cubic root of 2125543212 is about 1285.7503350950.

Adding to 2125543212 its reverse (2123455212), we get a palindrome (4248998424).

The spelling of 2125543212 in words is "two billion, one hundred twenty-five million, five hundred forty-three thousand, two hundred twelve".