30606221 has 4 divisors (see below), whose sum is σ = 30627744. Its totient is φ = 30584700.

The previous prime is 30606217. The next prime is 30606227. The reversal of 30606221 is 12260603.

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 a cyclic number.

It is not a de Polignac number, because 30606221 - 2² = 30606217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30606193 and 30606202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30606227) 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, 8465 + ... + 11526.

It is an arithmetic number, because the mean of its divisors is an integer number (7656936).

Almost surely, 2^30606221 is an apocalyptic number.

It is an amenable number.

30606221 is a deficient number, since it is larger than the sum of its proper divisors (21523).

30606221 is a wasteful number, since it uses less digits than its factorization.

30606221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21522.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30606221 is about 5532.2889476238. The cubic root of 30606221 is about 312.8022752008.

Adding to 30606221 its reverse (12260603), we get a palindrome (42866824).

The spelling of 30606221 in words is "thirty million, six hundred six thousand, two hundred twenty-one".