2772775281 has 16 divisors (see below), whose sum is σ = 3874642560. Its totient is φ = 1760415360.

The previous prime is 2772775277. The next prime is 2772775309. The reversal of 2772775281 is 1825772772.

It is not a de Polignac number, because 2772775281 - 2² = 2772775277 is a prime.

It is a super-2 number, since 2×2772775281² = 15376565517849257922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2772775281.

It is not an unprimeable number, because it can be changed into a prime (2772775211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71940 + ... + 103541.

It is an arithmetic number, because the mean of its divisors is an integer number (242165160).

Almost surely, 2^2772775281 is an apocalyptic number.

It is an amenable number.

2772775281 is a deficient number, since it is larger than the sum of its proper divisors (1101867279).

2772775281 is a wasteful number, since it uses less digits than its factorization.

2772775281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175736.

The product of its digits is 768320, while the sum is 48.

The square root of 2772775281 is about 52657.1484320980. The cubic root of 2772775281 is about 1404.8767479256.

The spelling of 2772775281 in words is "two billion, seven hundred seventy-two million, seven hundred seventy-five thousand, two hundred eighty-one".