2831172861 has 16 divisors (see below), whose sum is σ = 4120227648. Its totient is φ = 1714963200.

The previous prime is 2831172857. The next prime is 2831172871. The reversal of 2831172861 is 1682711382.

It is not a de Polignac number, because 2831172861 - 2² = 2831172857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2831172871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44421 + ... + 87381.

It is an arithmetic number, because the mean of its divisors is an integer number (257514228).

Almost surely, 2^2831172861 is an apocalyptic number.

It is an amenable number.

2831172861 is a deficient number, since it is larger than the sum of its proper divisors (1289054787).

2831172861 is a wasteful number, since it uses less digits than its factorization.

2831172861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44972.

The product of its digits is 32256, while the sum is 39.

The square root of 2831172861 is about 53208.7667682686. The cubic root of 2831172861 is about 1414.6710370806.

The spelling of 2831172861 in words is "two billion, eight hundred thirty-one million, one hundred seventy-two thousand, eight hundred sixty-one".