2871517261 has 4 divisors (see below), whose sum is σ = 2871753724. Its totient is φ = 2871280800.

The previous prime is 2871517237. The next prime is 2871517267. The reversal of 2871517261 is 1627151782.

2871517261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1979360100 + 892157161 = 44490^2 + 29869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2871517261 is a prime.

It is a super-2 number, since 2×2871517261² = 16491222760441884242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2871517267) 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, 98970 + ... + 124651.

It is an arithmetic number, because the mean of its divisors is an integer number (717938431).

Almost surely, 2^2871517261 is an apocalyptic number.

It is an amenable number.

2871517261 is a deficient number, since it is larger than the sum of its proper divisors (236463).

2871517261 is a wasteful number, since it uses less digits than its factorization.

2871517261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236462.

The product of its digits is 47040, while the sum is 40.

The square root of 2871517261 is about 53586.5399237532. The cubic root of 2871517261 is about 1421.3590871136.

The spelling of 2871517261 in words is "two billion, eight hundred seventy-one million, five hundred seventeen thousand, two hundred sixty-one".