2143235220 has 384 divisors, whose sum is σ = 7840530432. Its totient is φ = 425779200.

The previous prime is 2143235209. The next prime is 2143235233. The reversal of 2143235220 is 225323412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5090610 + ... + 5091030.

It is an arithmetic number, because the mean of its divisors is an integer number (20418048).

Almost surely, 2^2143235220 is an apocalyptic number.

2143235220 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 2143235220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3920265216).

2143235220 is an abundant number, since it is smaller than the sum of its proper divisors (5697295212).

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

2143235220 is a wasteful number, since it uses less digits than its factorization.

2143235220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2143235220 is about 46295.0885083936. The cubic root of 2143235220 is about 1289.3078072422.

Adding to 2143235220 its reverse (225323412), we get a palindrome (2368558632).

The spelling of 2143235220 in words is "two billion, one hundred forty-three million, two hundred thirty-five thousand, two hundred twenty".