2143243100 has 36 divisors (see below), whose sum is σ = 4654650000. Its totient is φ = 856594560.

The previous prime is 2143243079. The next prime is 2143243117. The reversal of 2143243100 is 13423412.

It is a super-2 number, since 2×2143243100² = 9186981971395220000, which contains 22 as substring.

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

It is a congruent number.

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, 123776 + ... + 140024.

Almost surely, 2^2143243100 is an apocalyptic number.

2143243100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143243100 is an abundant number, since it is smaller than the sum of its proper divisors (2511406900).

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

2143243100 is a wasteful number, since it uses less digits than its factorization.

2143243100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17582 (or 17575 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2143243100 is about 46295.1736145357. The cubic root of 2143243100 is about 1289.3093873664.

Adding to 2143243100 its reverse (13423412), we get a palindrome (2156666512).

The spelling of 2143243100 in words is "two billion, one hundred forty-three million, two hundred forty-three thousand, one hundred".