2145000000 has 448 divisors, whose sum is σ = 8334353664. Its totient is φ = 480000000.

The previous prime is 2144999999. The next prime is 2145000023. The reversal of 2145000000 is 5412.

2145000000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2145000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164999994 + ... + 165000006.

It is an arithmetic number, because the mean of its divisors is an integer number (18603468).

Almost surely, 2^2145000000 is an apocalyptic number.

2145000000 is a gapful number since it is divisible by the number (20) 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 2145000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4167176832).

2145000000 is an abundant number, since it is smaller than the sum of its proper divisors (6189353664).

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

2145000000 is an frugal number, since it uses more digits than its factorization.

2145000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2145000000 is about 46314.1447076376. The cubic root of 2145000000 is about 1289.6615902173.

Adding to 2145000000 its reverse (5412), we get a palindrome (2145005412).

The spelling of 2145000000 in words is "two billion, one hundred forty-five million", and thus it is an aban number.