2143506609 has 48 divisors (see below), whose sum is σ = 3295918080. Its totient is φ = 1339994880.

The previous prime is 2143506593. The next prime is 2143506619. The reversal of 2143506609 is 9066053412.

It is a happy number.

2143506609 is a `hidden beast` number, since 2 + 1 + 43 + 5 + 0 + 6 + 609 = 666.

It is not a de Polignac number, because 2143506609 - 2⁴ = 2143506593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2143506619) 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 47 ways as a sum of consecutive naturals, for example, 4098222 + ... + 4098744.

It is an arithmetic number, because the mean of its divisors is an integer number (68664960).

Almost surely, 2^2143506609 is an apocalyptic number.

2143506609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2143506609 is a deficient number, since it is larger than the sum of its proper divisors (1152411471).

2143506609 is a wasteful number, since it uses less digits than its factorization.

2143506609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 2143506609 is about 46298.0194932785. The cubic root of 2143506609 is about 1289.3622248481.

The spelling of 2143506609 in words is "two billion, one hundred forty-three million, five hundred six thousand, six hundred nine".