2747248821 has 6 divisors (see below), whose sum is σ = 3968248310. Its totient is φ = 1831499208.

The previous prime is 2747248759. The next prime is 2747248831. The reversal of 2747248821 is 1288427472.

It can be written as a sum of positive squares in only one way, i.e., 2640932100 + 106316721 = 51390^2 + 10311^2 .

It is not a de Polignac number, because 2747248821 - 2¹⁷ = 2747117749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2747248831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152624926 + ... + 152624943.

Almost surely, 2^2747248821 is an apocalyptic number.

It is an amenable number.

2747248821 is a deficient number, since it is larger than the sum of its proper divisors (1220999489).

2747248821 is a wasteful number, since it uses less digits than its factorization.

2747248821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305249875 (or 305249872 counting only the distinct ones).

The product of its digits is 401408, while the sum is 45.

The square root of 2747248821 is about 52414.2043820184. The cubic root of 2747248821 is about 1400.5523026651.

The spelling of 2747248821 in words is "two billion, seven hundred forty-seven million, two hundred forty-eight thousand, eight hundred twenty-one".