2142186005 has 4 divisors (see below), whose sum is σ = 2570623212. Its totient is φ = 1713748800.

The previous prime is 2142186001. The next prime is 2142186017. The reversal of 2142186005 is 5006812412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1001975716 + 1140210289 = 31654^2 + 33767^2 .

It is not a de Polignac number, because 2142186005 - 2² = 2142186001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142186001) 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 3 ways as a sum of consecutive naturals, for example, 214218596 + ... + 214218605.

It is an arithmetic number, because the mean of its divisors is an integer number (642655803).

Almost surely, 2^2142186005 is an apocalyptic number.

It is an amenable number.

2142186005 is a deficient number, since it is larger than the sum of its proper divisors (428437207).

2142186005 is an equidigital number, since it uses as much as digits as its factorization.

2142186005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428437206.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2142186005 is about 46283.7553035620. The cubic root of 2142186005 is about 1289.0973805183.

Adding to 2142186005 its reverse (5006812412), we get a palindrome (7148998417).

The spelling of 2142186005 in words is "two billion, one hundred forty-two million, one hundred eighty-six thousand, five".