47201521 has 2 divisors, whose sum is σ = 47201522. Its totient is φ = 47201520.

The previous prime is 47201513. The next prime is 47201533. The reversal of 47201521 is 12510274.

It is a happy number.

47201521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 87025 = 6864^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 47201521 - 2³ = 47201513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47201492 and 47201501.

It is not a weakly prime, because it can be changed into another prime (47201551) 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 as a sum of consecutive naturals, namely, 23600760 + 23600761.

It is an arithmetic number, because the mean of its divisors is an integer number (23600761).

Almost surely, 2^47201521 is an apocalyptic number.

It is an amenable number.

47201521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47201521 is an equidigital number, since it uses as much as digits as its factorization.

47201521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 47201521 is about 6870.3363090900. The cubic root of 47201521 is about 361.3976557430.

Adding to 47201521 its reverse (12510274), we get a palindrome (59711795).

It can be divided in two parts, 4720 and 1521, that added together give a square (6241 = 79²).

The spelling of 47201521 in words is "forty-seven million, two hundred one thousand, five hundred twenty-one".