47730221 has 16 divisors (see below), whose sum is σ = 62097408. Its totient is φ = 35574000.

The previous prime is 47730209. The next prime is 47730227. The reversal of 47730221 is 12203774.

47730221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47730221 - 2²² = 43535917 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 (47730227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11705 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (3881088).

Almost surely, 2^47730221 is an apocalyptic number.

It is an amenable number.

47730221 is a deficient number, since it is larger than the sum of its proper divisors (14367187).

47730221 is a wasteful number, since it uses less digits than its factorization.

47730221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26992.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 47730221 is about 6908.7061740966. The cubic root of 47730221 is about 362.7419765291.

Adding to 47730221 its reverse (12203774), we get a palindrome (59933995).

The spelling of 47730221 in words is "forty-seven million, seven hundred thirty thousand, two hundred twenty-one".