2730031221 has 4 divisors (see below), whose sum is σ = 3640041632. Its totient is φ = 1820020812.

The previous prime is 2730031201. The next prime is 2730031229. The reversal of 2730031221 is 1221300372.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2730031221 - 2⁵ = 2730031189 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 (2730031229) 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, 455005201 + ... + 455005206.

It is an arithmetic number, because the mean of its divisors is an integer number (910010408).

Almost surely, 2^2730031221 is an apocalyptic number.

It is an amenable number.

2730031221 is a deficient number, since it is larger than the sum of its proper divisors (910010411).

2730031221 is an equidigital number, since it uses as much as digits as its factorization.

2730031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910010410.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2730031221 is about 52249.7006785685. The cubic root of 2730031221 is about 1397.6203146746.

Adding to 2730031221 its reverse (1221300372), we get a palindrome (3951331593).

The spelling of 2730031221 in words is "two billion, seven hundred thirty million, thirty-one thousand, two hundred twenty-one".