30144221 has 4 divisors (see below), whose sum is σ = 30655200. Its totient is φ = 29633244.

The previous prime is 30144217. The next prime is 30144223. The reversal of 30144221 is 12244103.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12244103 = 61 ⋅200723.

It is a cyclic number.

It is not a de Polignac number, because 30144221 - 2² = 30144217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30144221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30144223) 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, 255401 + ... + 255518.

It is an arithmetic number, because the mean of its divisors is an integer number (7663800).

Almost surely, 2^30144221 is an apocalyptic number.

It is an amenable number.

30144221 is a deficient number, since it is larger than the sum of its proper divisors (510979).

30144221 is an equidigital number, since it uses as much as digits as its factorization.

30144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510978.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 30144221 is about 5490.3753059331. The cubic root of 30144221 is about 311.2203750237.

Adding to 30144221 its reverse (12244103), we get a palindrome (42388324).

The spelling of 30144221 in words is "thirty million, one hundred forty-four thousand, two hundred twenty-one".