2143220432 has 40 divisors (see below), whose sum is σ = 4252993416. Its totient is φ = 1045979136.

The previous prime is 2143220423. The next prime is 2143220459. The reversal of 2143220432 is 2340223412.

It can be written as a sum of positive squares in 4 ways, for example, as 617224336 + 1525996096 = 24844^2 + 39064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2143220398 and 2143220407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103838 + ... + 122754.

Almost surely, 2^2143220432 is an apocalyptic number.

It is an amenable number.

2143220432 is a deficient number, since it is larger than the sum of its proper divisors (2109772984).

2143220432 is a wasteful number, since it uses less digits than its factorization.

2143220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19095 (or 19089 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2143220432 is about 46294.9287935515. The cubic root of 2143220432 is about 1289.3048418922.

Adding to 2143220432 its reverse (2340223412), we get a palindrome (4483443844).

The spelling of 2143220432 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, four hundred thirty-two".