30106221 has 8 divisors (see below), whose sum is σ = 40170144. Its totient is φ = 20056560.

The previous prime is 30106217. The next prime is 30106243. The reversal of 30106221 is 12260103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30106221 - 2² = 30106217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30106221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30106421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3195 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (5021268).

Almost surely, 2^30106221 is an apocalyptic number.

It is an amenable number.

30106221 is a deficient number, since it is larger than the sum of its proper divisors (10063923).

30106221 is a wasteful number, since it uses less digits than its factorization.

30106221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 30106221 is about 5486.9136133167. The cubic root of 30106221 is about 311.0895445604.

Adding to 30106221 its reverse (12260103), we get a palindrome (42366324).

The spelling of 30106221 in words is "thirty million, one hundred six thousand, two hundred twenty-one".