2771138731 has 2 divisors, whose sum is σ = 2771138732. Its totient is φ = 2771138730.

The previous prime is 2771138707. The next prime is 2771138759. The reversal of 2771138731 is 1378311772.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2771138731 - 2¹³ = 2771130539 is a prime.

It is a super-2 number, since 2×2771138731² = 15358419732896580722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2771138131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385569365 + 1385569366.

It is an arithmetic number, because the mean of its divisors is an integer number (1385569366).

Almost surely, 2^2771138731 is an apocalyptic number.

2771138731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2771138731 is an equidigital number, since it uses as much as digits as its factorization.

2771138731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 40.

The square root of 2771138731 is about 52641.6064629491. The cubic root of 2771138731 is about 1404.6002976435.

The spelling of 2771138731 in words is "two billion, seven hundred seventy-one million, one hundred thirty-eight thousand, seven hundred thirty-one".