2145501200 has 60 divisors (see below), whose sum is σ = 5332339140. Its totient is φ = 828602880.

The previous prime is 2145501181. The next prime is 2145501233. The reversal of 2145501200 is 21055412.

It can be written as a sum of positive squares in 6 ways, for example, as 33547264 + 2111953936 = 5792^2 + 45956^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80879 + ... + 104078.

It is an arithmetic number, because the mean of its divisors is an integer number (88872319).

Almost surely, 2^2145501200 is an apocalyptic number.

2145501200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145501200 is an abundant number, since it is smaller than the sum of its proper divisors (3186837940).

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

2145501200 is a wasteful number, since it uses less digits than its factorization.

2145501200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185004 (or 184993 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2145501200 is about 46319.5552655679. Note that the first 3 decimals coincide. The cubic root of 2145501200 is about 1289.7620296969.

Adding to 2145501200 its reverse (21055412), we get a palindrome (2166556612).

The spelling of 2145501200 in words is "two billion, one hundred forty-five million, five hundred one thousand, two hundred".