2731394251 has 2 divisors, whose sum is σ = 2731394252. Its totient is φ = 2731394250.

The previous prime is 2731394249. The next prime is 2731394291. The reversal of 2731394251 is 1524931372.

2731394251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2731394251 - 2¹ = 2731394249 is a prime.

Together with 2731394249, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2731394251.

It is not a weakly prime, because it can be changed into another prime (2731394291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365697125 + 1365697126.

It is an arithmetic number, because the mean of its divisors is an integer number (1365697126).

Almost surely, 2^2731394251 is an apocalyptic number.

2731394251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731394251 is an equidigital number, since it uses as much as digits as its factorization.

2731394251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 2731394251 is about 52262.7424749218. The cubic root of 2731394251 is about 1397.8528738547.

The spelling of 2731394251 in words is "two billion, seven hundred thirty-one million, three hundred ninety-four thousand, two hundred fifty-one".