2731985971 has 16 divisors (see below), whose sum is σ = 3238028640. Its totient is φ = 2272273920.

The previous prime is 2731985957. The next prime is 2731985989. The reversal of 2731985971 is 1795891372.

2731985971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2731985971 - 2⁷ = 2731985843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2731985941) 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, 68376 + ... + 100693.

It is an arithmetic number, because the mean of its divisors is an integer number (202376790).

Almost surely, 2^2731985971 is an apocalyptic number.

2731985971 is a deficient number, since it is larger than the sum of its proper divisors (506042669).

2731985971 is a wasteful number, since it uses less digits than its factorization.

2731985971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169206.

The product of its digits is 952560, while the sum is 52.

The square root of 2731985971 is about 52268.4031801240. The cubic root of 2731985971 is about 1397.9538086038.

The spelling of 2731985971 in words is "two billion, seven hundred thirty-one million, nine hundred eighty-five thousand, nine hundred seventy-one".