2143321400 has 144 divisors (see below), whose sum is σ = 5656096320. Its totient is φ = 753984000.

The previous prime is 2143321381. The next prime is 2143321417. The reversal of 2143321400 is 41233412.

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 35 ways as a sum of consecutive naturals, for example, 748772 + ... + 751628.

Almost surely, 2^2143321400 is an apocalyptic number.

2143321400 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 2143321400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2828048160).

2143321400 is an abundant number, since it is smaller than the sum of its proper divisors (3512774920).

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

2143321400 is a wasteful number, since it uses less digits than its factorization.

2143321400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 2906 counting only the distinct ones).

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

The square root of 2143321400 is about 46296.0192673193. The cubic root of 2143321400 is about 1289.3250881356.

Adding to 2143321400 its reverse (41233412), we get a palindrome (2184554812).

The spelling of 2143321400 in words is "two billion, one hundred forty-three million, three hundred twenty-one thousand, four hundred".