2143245220 has 24 divisors (see below), whose sum is σ = 4737700800. Its totient is φ = 812176992.

The previous prime is 2143245211. The next prime is 2143245229. The reversal of 2143245220 is 225423412.

2143245220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2143245211) and next prime (2143245229).

It is not an unprimeable number, because it can be changed into a prime (2143245229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2819680 + ... + 2820439.

It is an arithmetic number, because the mean of its divisors is an integer number (197404200).

Almost surely, 2^2143245220 is an apocalyptic number.

2143245220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143245220 is an abundant number, since it is smaller than the sum of its proper divisors (2594455580).

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

2143245220 is a wasteful number, since it uses less digits than its factorization.

2143245220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5640147 (or 5640145 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2143245220 is about 46295.1965110853. The cubic root of 2143245220 is about 1289.3098124752.

Adding to 2143245220 its reverse (225423412), we get a palindrome (2368668632).

The spelling of 2143245220 in words is "two billion, one hundred forty-three million, two hundred forty-five thousand, two hundred twenty".