2731415861 has 2 divisors, whose sum is σ = 2731415862. Its totient is φ = 2731415860.

The previous prime is 2731415833. The next prime is 2731415879. The reversal of 2731415861 is 1685141372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1908816100 + 822599761 = 43690^2 + 28681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731415861 - 2²² = 2727221557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2731415801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365707930 + 1365707931.

It is an arithmetic number, because the mean of its divisors is an integer number (1365707931).

Almost surely, 2^2731415861 is an apocalyptic number.

It is an amenable number.

2731415861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731415861 is an equidigital number, since it uses as much as digits as its factorization.

2731415861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 2731415861 is about 52262.9492183516. The cubic root of 2731415861 is about 1397.8565603140.

The spelling of 2731415861 in words is "two billion, seven hundred thirty-one million, four hundred fifteen thousand, eight hundred sixty-one".