2143220500 has 96 divisors (see below), whose sum is σ = 4911798528. Its totient is φ = 815408000.

The previous prime is 2143220483. The next prime is 2143220503. The reversal of 2143220500 is 50223412.

It is a super-2 number, since 2×2143220500² = 9186788223240500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143220503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2610090 + ... + 2610910.

It is an arithmetic number, because the mean of its divisors is an integer number (51164568).

Almost surely, 2^2143220500 is an apocalyptic number.

2143220500 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 2143220500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2455899264).

2143220500 is an abundant number, since it is smaller than the sum of its proper divisors (2768578028).

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

2143220500 is a wasteful number, since it uses less digits than its factorization.

2143220500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2143220500 is about 46294.9295279731. The cubic root of 2143220500 is about 1289.3048555279.

Adding to 2143220500 its reverse (50223412), we get a palindrome (2193443912).

The spelling of 2143220500 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, five hundred".