2471931641 has 2 divisors, whose sum is σ = 2471931642. Its totient is φ = 2471931640.

The previous prime is 2471931611. The next prime is 2471931643. The reversal of 2471931641 is 1461391742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2360016400 + 111915241 = 48580^2 + 10579^2 .

It is a cyclic number.

It is not a de Polignac number, because 2471931641 - 2⁶ = 2471931577 is a prime.

It is a super-2 number, since 2×2471931641² = 12220892075553905762, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2471931643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2471931595 and 2471931604.

It is not a weakly prime, because it can be changed into another prime (2471931643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1235965820 + 1235965821.

It is an arithmetic number, because the mean of its divisors is an integer number (1235965821).

Almost surely, 2^2471931641 is an apocalyptic number.

It is an amenable number.

2471931641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2471931641 is an equidigital number, since it uses as much as digits as its factorization.

2471931641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 2471931641 is about 49718.5241233084. The cubic root of 2471931641 is about 1352.1103966741.

The spelling of 2471931641 in words is "two billion, four hundred seventy-one million, nine hundred thirty-one thousand, six hundred forty-one".