47305521 has 12 divisors (see below), whose sum is σ = 69620148. Its totient is φ = 30941664.

The previous prime is 47305487. The next prime is 47305523. The reversal of 47305521 is 12550374.

It is a happy number.

47305521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18533025 + 28772496 = 4305^2 + 5364^2 .

It is not a de Polignac number, because 47305521 - 2⁷ = 47305393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47305523) 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 11 ways as a sum of consecutive naturals, for example, 49110 + ... + 50063.

It is an arithmetic number, because the mean of its divisors is an integer number (5801679).

Almost surely, 2^47305521 is an apocalyptic number.

It is an amenable number.

47305521 is a deficient number, since it is larger than the sum of its proper divisors (22314627).

47305521 is a wasteful number, since it uses less digits than its factorization.

47305521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99232 (or 99229 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 47305521 is about 6877.9009152502. The cubic root of 47305521 is about 361.6628857960.

Adding to 47305521 its reverse (12550374), we get a palindrome (59855895).

The spelling of 47305521 in words is "forty-seven million, three hundred five thousand, five hundred twenty-one".