2143579155 has 16 divisors (see below), whose sum is σ = 3430438560. Its totient is φ = 1143004928.

The previous prime is 2143579121. The next prime is 2143579159. The reversal of 2143579155 is 5519753412.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143579155 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2143579159) 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 15 ways as a sum of consecutive naturals, for example, 78991 + ... + 102599.

It is an arithmetic number, because the mean of its divisors is an integer number (214402410).

Almost surely, 2^2143579155 is an apocalyptic number.

2143579155 is a deficient number, since it is larger than the sum of its proper divisors (1286859405).

2143579155 is a wasteful number, since it uses less digits than its factorization.

2143579155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29670.

The product of its digits is 189000, while the sum is 42.

The square root of 2143579155 is about 46298.8029542881. The cubic root of 2143579155 is about 1289.3767706421.

The spelling of 2143579155 in words is "two billion, one hundred forty-three million, five hundred seventy-nine thousand, one hundred fifty-five".