2881081261 has 2 divisors, whose sum is σ = 2881081262. Its totient is φ = 2881081260.

The previous prime is 2881081253. The next prime is 2881081267. The reversal of 2881081261 is 1621801882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2192018761 + 689062500 = 46819^2 + 26250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2881081261 - 2³ = 2881081253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2881081261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2881081267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1440540630 + 1440540631.

It is an arithmetic number, because the mean of its divisors is an integer number (1440540631).

Almost surely, 2^2881081261 is an apocalyptic number.

It is an amenable number.

2881081261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2881081261 is an equidigital number, since it uses as much as digits as its factorization.

2881081261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 37.

The square root of 2881081261 is about 53675.7045691996. The cubic root of 2881081261 is about 1422.9353518335.

The spelling of 2881081261 in words is "two billion, eight hundred eighty-one million, eighty-one thousand, two hundred sixty-one".