2871571609 has 4 divisors (see below), whose sum is σ = 3040487604. Its totient is φ = 2702655616.

The previous prime is 2871571603. The next prime is 2871571613. The reversal of 2871571609 is 9061751782.

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 1610256384 + 1261315225 = 40128^2 + 35515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2871571609 - 2¹⁵ = 2871538841 is a prime.

It is a super-2 number, since 2×2871571609² = 16491847011229697762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2871571603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84457972 + ... + 84458005.

It is an arithmetic number, because the mean of its divisors is an integer number (760121901).

Almost surely, 2^2871571609 is an apocalyptic number.

It is an amenable number.

2871571609 is a deficient number, since it is larger than the sum of its proper divisors (168915995).

2871571609 is a wasteful number, since it uses less digits than its factorization.

2871571609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168915994.

The product of its (nonzero) digits is 211680, while the sum is 46.

The square root of 2871571609 is about 53587.0470263104. The cubic root of 2871571609 is about 1421.3680542124.

The spelling of 2871571609 in words is "two billion, eight hundred seventy-one million, five hundred seventy-one thousand, six hundred nine".