2131686687 has 32 divisors (see below), whose sum is σ = 3138919168. Its totient is φ = 1278498816.

The previous prime is 2131686677. The next prime is 2131686691. The reversal of 2131686687 is 7866861312.

It is not a de Polignac number, because 2131686687 - 2¹⁰ = 2131685663 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 (2131686617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966528 + ... + 968730.

It is an arithmetic number, because the mean of its divisors is an integer number (98091224).

Almost surely, 2^2131686687 is an apocalyptic number.

2131686687 is a deficient number, since it is larger than the sum of its proper divisors (1007232481).

2131686687 is a wasteful number, since it uses less digits than its factorization.

2131686687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its digits is 580608, while the sum is 48.

The square root of 2131686687 is about 46170.1926246794. The cubic root of 2131686687 is about 1286.9878818132.

The spelling of 2131686687 in words is "two billion, one hundred thirty-one million, six hundred eighty-six thousand, six hundred eighty-seven".