47306021 has 6 divisors (see below), whose sum is σ = 55029510. Its totient is φ = 40547976.

The previous prime is 47306011. The next prime is 47306033. The reversal of 47306021 is 12060374.

47306021 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 only one way, i.e., 42837025 + 4468996 = 6545^2 + 2114^2 .

It is not a de Polignac number, because 47306021 - 2⁶ = 47305957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47306011) 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 5 ways as a sum of consecutive naturals, for example, 482666 + ... + 482763.

It is an arithmetic number, because the mean of its divisors is an integer number (9171585).

Almost surely, 2^47306021 is an apocalyptic number.

It is an amenable number.

47306021 is a deficient number, since it is larger than the sum of its proper divisors (7723489).

47306021 is an equidigital number, since it uses as much as digits as its factorization.

47306021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965443 (or 965436 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 47306021 is about 6877.9372634533. The cubic root of 47306021 is about 361.6641600011.

Adding to 47306021 its reverse (12060374), we get a palindrome (59366395).

The spelling of 47306021 in words is "forty-seven million, three hundred six thousand, twenty-one".