2143423100 has 72 divisors (see below), whose sum is σ = 5724612768. Its totient is φ = 678355200.

The previous prime is 2143423081. The next prime is 2143423103. The reversal of 2143423100 is 13243412.

It is a super-2 number, since 2×2143423100² = 9188525171227220000, 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 not an unprimeable number, because it can be changed into a prime (2143423103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108671 + ... + 126870.

Almost surely, 2^2143423100 is an apocalyptic number.

2143423100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143423100 is an abundant number, since it is smaller than the sum of its proper divisors (3581189668).

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

2143423100 is a wasteful number, since it uses less digits than its factorization.

2143423100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235575 (or 235568 counting only the distinct ones).

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

The square root of 2143423100 is about 46297.1176208627. The cubic root of 2143423100 is about 1289.3454805178.

Adding to 2143423100 its reverse (13243412), we get a palindrome (2156666512).

The spelling of 2143423100 in words is "two billion, one hundred forty-three million, four hundred twenty-three thousand, one hundred".