2775212081 has 2 divisors, whose sum is σ = 2775212082. Its totient is φ = 2775212080.

The previous prime is 2775212057. The next prime is 2775212113. The reversal of 2775212081 is 1802125772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635474481 + 1139737600 = 40441^2 + 33760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2775212081 - 2¹⁴ = 2775195697 is a prime.

It is a super-2 number, since 2×2775212081² = 15403604189056701122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2775212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387606040 + 1387606041.

It is an arithmetic number, because the mean of its divisors is an integer number (1387606041).

Almost surely, 2^2775212081 is an apocalyptic number.

It is an amenable number.

2775212081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775212081 is an equidigital number, since it uses as much as digits as its factorization.

2775212081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 2775212081 is about 52680.2817095733. The cubic root of 2775212081 is about 1405.2881770219.

The spelling of 2775212081 in words is "two billion, seven hundred seventy-five million, two hundred twelve thousand, eighty-one".