2072171005 has 4 divisors (see below), whose sum is σ = 2486605212. Its totient is φ = 1657736800.

The previous prime is 2072170981. The next prime is 2072171009. The reversal of 2072171005 is 5001712702.

It is a happy number.

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 418366116 + 1653804889 = 20454^2 + 40667^2 .

It is not a de Polignac number, because 2072171005 - 2¹⁷ = 2072039933 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 (2072171009) 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, 207217096 + ... + 207217105.

It is an arithmetic number, because the mean of its divisors is an integer number (621651303).

Almost surely, 2^2072171005 is an apocalyptic number.

It is an amenable number.

2072171005 is a deficient number, since it is larger than the sum of its proper divisors (414434207).

2072171005 is an equidigital number, since it uses as much as digits as its factorization.

2072171005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414434206.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 2072171005 is about 45521.1050502951. The cubic root of 2072171005 is about 1274.8972886631.

Adding to 2072171005 its reverse (5001712702), we get a palindrome (7073883707).

The spelling of 2072171005 in words is "two billion, seventy-two million, one hundred seventy-one thousand, five".