2749910221 has 4 divisors (see below), whose sum is σ = 2816981244. Its totient is φ = 2682839200.

The previous prime is 2749910201. The next prime is 2749910237. The reversal of 2749910221 is 1220199472.

2749910221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 441588196 + 2308322025 = 21014^2 + 48045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2749910221 - 2¹⁵ = 2749877453 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 (2749910201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33535450 + ... + 33535531.

It is an arithmetic number, because the mean of its divisors is an integer number (704245311).

Almost surely, 2^2749910221 is an apocalyptic number.

It is an amenable number.

2749910221 is a deficient number, since it is larger than the sum of its proper divisors (67071023).

2749910221 is an equidigital number, since it uses as much as digits as its factorization.

2749910221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67071022.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2749910221 is about 52439.5863923430. The cubic root of 2749910221 is about 1401.0044188412.

The spelling of 2749910221 in words is "two billion, seven hundred forty-nine million, nine hundred ten thousand, two hundred twenty-one".