2143643830 has 32 divisors (see below), whose sum is σ = 3935456928. Its totient is φ = 840403200.

The previous prime is 2143643809. The next prime is 2143643839. The reversal of 2143643830 is 383463412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143643839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783565 + ... + 786295.

It is an arithmetic number, because the mean of its divisors is an integer number (122983029).

Almost surely, 2^2143643830 is an apocalyptic number.

2143643830 is a deficient number, since it is larger than the sum of its proper divisors (1791813098).

2143643830 is a wasteful number, since it uses less digits than its factorization.

2143643830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 2143643830 is about 46299.5014012030. The cubic root of 2143643830 is about 1289.3897379891.

The spelling of 2143643830 in words is "two billion, one hundred forty-three million, six hundred forty-three thousand, eight hundred thirty".