30154221 has 32 divisors (see below), whose sum is σ = 46131200. Its totient is φ = 19459440.

The previous prime is 30154217. The next prime is 30154261. The reversal of 30154221 is 12245103.

It is not a de Polignac number, because 30154221 - 2² = 30154217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30154194 and 30154203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30154261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142806 + ... + 143016.

It is an arithmetic number, because the mean of its divisors is an integer number (1441600).

Almost surely, 2^30154221 is an apocalyptic number.

It is an amenable number.

30154221 is a deficient number, since it is larger than the sum of its proper divisors (15976979).

30154221 is a wasteful number, since it uses less digits than its factorization.

30154221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30154221 is about 5491.2859149747. The cubic root of 30154221 is about 311.2547858170.

Adding to 30154221 its reverse (12245103), we get a palindrome (42399324).

The spelling of 30154221 in words is "thirty million, one hundred fifty-four thousand, two hundred twenty-one".