30005244221 has 4 divisors (see below), whose sum is σ = 30094280892. Its totient is φ = 29916207552.

The previous prime is 30005244173. The next prime is 30005244263. The reversal of 30005244221 is 12244250003.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12244250003 = 31357 ⋅390479.

It can be written as a sum of positive squares in 2 ways, for example, as 11488838596 + 18516405625 = 107186^2 + 136075^2 .

It is a cyclic number.

It is not a de Polignac number, because 30005244221 - 2¹⁰ = 30005243197 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 (30005244721) 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, 44517830 + ... + 44518503.

It is an arithmetic number, because the mean of its divisors is an integer number (7523570223).

Almost surely, 2^30005244221 is an apocalyptic number.

It is an amenable number.

30005244221 is a deficient number, since it is larger than the sum of its proper divisors (89036671).

30005244221 is an equidigital number, since it uses as much as digits as its factorization.

30005244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89036670.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 30005244221 its reverse (12244250003), we get a palindrome (42249494224).

The spelling of 30005244221 in words is "thirty billion, five million, two hundred forty-four thousand, two hundred twenty-one".