2772234721 has 4 divisors (see below), whose sum is σ = 2839850244. Its totient is φ = 2704619200.

The previous prime is 2772234713. The next prime is 2772234733. The reversal of 2772234721 is 1274322772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 242144721 + 2530090000 = 15561^2 + 50300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2772234721 - 2³ = 2772234713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2772234221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33807700 + ... + 33807781.

It is an arithmetic number, because the mean of its divisors is an integer number (709962561).

Almost surely, 2^2772234721 is an apocalyptic number.

It is an amenable number.

2772234721 is a deficient number, since it is larger than the sum of its proper divisors (67615523).

2772234721 is an equidigital number, since it uses as much as digits as its factorization.

2772234721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67615522.

The product of its digits is 65856, while the sum is 37.

The square root of 2772234721 is about 52652.0153555398. The cubic root of 2772234721 is about 1404.7854471585.

The spelling of 2772234721 in words is "two billion, seven hundred seventy-two million, two hundred thirty-four thousand, seven hundred twenty-one".